{ "response": { "Key": "DEN-SAN", "orig": { "code": "DEN", "type": "airport", "city": "Denver", "fullCity": "Denver, Colorado", "airport": "Denver Intl Airport" }, "dest": { "code": "SAN", "type": "airport", "city": "San Diego", "fullCity": "San Diego, California", "airport": "San Diego Intl Airport" }, "faq": { "q0": { "question": "What is the typical flight duration from Denver to San Diego?", "answer": "The flight from Denver to San Diego is about 850 miles and typically takes 2 hours and 25 minutes nonstop. The return flight also takes about 2 hours and 25 minutes, so there is no meaningful difference in duration between the two directions.", "methodology": "Carrier service, flight times and distances for this route come from our flight-schedule database, which draws on published airline timetables, U.S. government schedule data, and observed operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We report the days of the week and the departure times each carrier operates. The typical flight time is the median scheduled block time, given both per carrier and across all carriers on the route; where a schedule does not publish an elapsed time, it is derived from the scheduled departure and arrival times converted to UTC. Outbound and return times are computed by the same method, so the difference between them is directly comparable and reflects prevailing winds rather than any change in derivation. Distance is the great-circle distance between the two specific airports named, so an actual flown track is typically 2-5% longer. Where shown, on-time departure and arrival rates and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, which covers U.S. domestic routes only; where a typical fare is shown, it comes from the U.S. DOT Airline Origin and Destination Survey (DB1B), a quarterly 10% sample of tickets sold.", "toolsUsed": [ "flight_schedule" ] }, "q3": { "question": "What are the ground transportation options in San Diego?", "answer": "San Diego International Airport (SAN) is about 3 miles from downtown, making ground transportation quick and easy. Ride-hailing services like Uber and Lyft, taxis, and rental cars are all readily available, with ride shares being the most popular and fastest option, typically reaching the city center in under 10 minutes. Public transit via bus route 992 connects the airport to downtown, but it can take 15–30 minutes depending on traffic. There is no direct light-rail or trolley link from the airport itself, though the Santa Fe Depot is a nearby hub for regional rail. Walking or biking is also feasible given the close proximity.", "toolsUsed": [ "article_lookup" ], "references": [ { "url": "https://www.san.org/", "title": "San Diego International Airport | SAN.org", "favicon": "https://www.san.org/wp-content/uploads/2025/09/faviconArtboard-1.png", "time_published": "2026-07-15T20:42:55Z" }, { "url": "http://san.org/Flights", "title": "Arrivals - Check Flight Status | San Diego International Airport", "favicon": "https://cdn-iledcni.nitrocdn.com/MENtWJRLkriAtmpQmYbUxvjofqTlAYUZ/assets/images/optimized/rev-3854d1f/www.san.org/wp-content/uploads/2025/09/faviconArtboard-1.png", "time_published": "2026-05-12T02:59:40Z" }, { "url": "https://en.wikipedia.org/wiki/Streets_and_highways_of_San_Diego", "title": "Transportation in San Diego - Wikipedia", "time_published": "2026-02-27T03:32:46Z" }, { "url": "https://en.wikipedia.org/wiki/Transportation_in_San_Diego", "title": "Transportation in San Diego", "time_published": "2026-02-27T03:32:46Z" }, { "url": "https://flysanantonio.com/nonstop_destinations/san-diego-ca/", "title": "San Diego, CA - San Antonio International Airport", "time_published": "2015-12-15T00:00:00Z" } ] }, "q4": { "question": "When is the cheapest time to fly from Denver to San Diego?", "answer": "The cheapest months to fly from Denver to San Diego are November (average $191), September ($208), and August ($208), while the most expensive are June ($284), December ($270), and October ($265).", "methodology": "This 'good deal' estimate shows a representative best price for each departure date across roughly a 12-month window (about 3 months back and 9 months forward). It is built from real flight prices found by Priceline users searching this route, accumulated into a price history for each departure date. Rather than weighting all of that history equally, we apply exponential time decay so recent prices dominate — a price seen yesterday counts almost in full, one from about a month ago roughly a third, and prices from a few months back very little — giving a figure that tracks today's market instead of a stale long-run average. Clear price outliers are removed before any calculation, departure dates with no observations are filled in from nearby dates, and the resulting curve is lightly smoothed so it reads as a clean seasonal trend rather than day-to-day noise.", "toolsUsed": [ "seasonal_prices" ] }, "q5": { "question": "How far in advance should I book tickets from Denver to San Diego?", "answer": "For Denver to San Diego, the best fares are typically found when booking 6 to 9 weeks ahead, with the lowest price around $110 about two months out. For summer and holiday travel, it's wise to book a bit earlier, as last-minute tickets can jump to nearly $300.", "methodology": "This booking-window guidance is built from the same real flight prices found by Priceline users searching this route, re-grouped by how many days before departure each price was seen (from the departure day out to about 180 days ahead) across the route's price history. At each booking lead time we report the 25th-percentile price — the cheaper end of what travelers were quoted, rather than the rock-bottom minimum (which can be a fluke) or the average (which is pulled up by expensive last-minute fares). The buy-or-wait advice then applies a risk premium that grows as departure approaches, since seat availability shrinks and prices become less predictable; using that adjusted curve we flag windows where waiting is likely to save a meaningful amount (at least $20 or 5%) versus windows where booking now is the better call. Isolated single-day recommendations are filtered out, so the advice only reflects a window that holds for several days in a row.", "toolsUsed": [ "booking_timing" ] }, "q6": { "question": "Are overnight (red‑eye) flights available from Denver to San Diego?", "answer": "Yes, overnight red-eye flights are available from Denver to San Diego. Southwest operates up to 25 red-eyes per week departing between 9:35 PM and 10:00 PM, and Frontier flies about 14 per week departing between 9:36 PM and 10:43 PM. These flights land in San Diego the same night, typically just before midnight.", "methodology": "Red-eye flights are identified from scheduled local departure and arrival times in our flight-schedule database — built from published airline timetables and official schedule data, including U.S. Department of Transportation records for domestic routes — flagging services that depart late at night and arrive the following morning; for connecting itineraries the red-eye is based on the timing of the overnight long-haul leg.", "toolsUsed": [ "redeye_flights" ] }, "q7": { "question": "Which airlines usually operate this route from Denver to San Diego?", "answer": "Southwest, United, Frontier, and Alaska Airlines all fly nonstop from Denver to San Diego. Southwest operates the most flights, with 194 weekly departures, followed by United at 69, Frontier at 31, and Alaska at 21 (including one daily flight operated by SkyWest). Typical median fares are around $342 on Southwest, $352 on United, and $365 on Alaska, though no median fare is listed for Frontier.", "methodology": "Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.", "toolsUsed": [ "route_airlines" ] }, "q8": { "question": "If I need a connection, what are common layover cities between Denver and San Diego?", "answer": "Common layover cities include Phoenix, Las Vegas, Salt Lake City, and Los Angeles, offering efficient transfers and frequent flights to San Diego." }, "q9": { "question": "How reliable are on‑time arrivals on this route from Denver to San Diego?", "answer": "On the Denver to San Diego route, Alaska Airlines has the best on-time arrival performance at 81% with a 1% cancellation rate. United follows at 78% on time and 0% cancellations, Frontier at 75% on time with 0% cancellations, and Southwest at 68% on time with no cancellations.", "methodology": "Carrier service, flight times and distances for this route come from our flight-schedule database, which draws on published airline timetables, U.S. government schedule data, and observed operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We report the days of the week and the departure times each carrier operates. The typical flight time is the median scheduled block time, given both per carrier and across all carriers on the route; where a schedule does not publish an elapsed time, it is derived from the scheduled departure and arrival times converted to UTC. Outbound and return times are computed by the same method, so the difference between them is directly comparable and reflects prevailing winds rather than any change in derivation. Distance is the great-circle distance between the two specific airports named, so an actual flown track is typically 2-5% longer. Where shown, on-time departure and arrival rates and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, which covers U.S. domestic routes only; where a typical fare is shown, it comes from the U.S. DOT Airline Origin and Destination Survey (DB1B), a quarterly 10% sample of tickets sold.", "toolsUsed": [ "flight_schedule" ] }, "q10": { "question": "Which months have the best weather for traveling to San Diego?", "answer": "March through May and September through November offer sunny, mild weather and fewer tourists than summer." }, "q11": { "question": "What documents should I bring with me to the airport when flying from Denver to San Diego?", "answer": "For a domestic flight from Denver to San Diego, you need a Real ID or other acceptable ID like a passport. Bring a payment method for baggage and any required vaccination or health documents." }, "q12": { "question": "Which airport should I use in San Diego?", "answer": "San Diego International Airport is the only commercial airport serving the city. It is located just three miles from downtown, making it very convenient for reaching the city centre and attractions like the Gaslamp Quarter and Balboa Park." }, "q13": { "question": "How do I get to Denver Intl Airport from the city center?", "answer": "The most popular and fastest way to reach Denver International Airport (DEN) from downtown is the RTD A Line commuter train, which runs from Denver Union Station to the airport transit center in about 37 minutes. Regional buses, ride‑share services like Uber and Lyft, and taxis are also available, with ride‑share and taxis taking about 30–40 minutes by road. Driving yourself is an option with several on‑site parking lots, though the airport is about 25 miles from downtown, so driving and parking is generally the most expensive choice. The train is typically the most cost‑effective, while ride‑share and taxis are pricier but offer door‑to‑door convenience.", "toolsUsed": [ "article_lookup" ], "references": [ { "url": "https://www.flydenver.com/parking-and-transportation/to-and-from/airport-transit-center/", "title": "Airport Transit Center | Denver International Airport", "time_published": "2026-02-24T17:09:34Z" }, { "url": "https://flydenver.com/connections/", "title": "Connections | Denver International Airport", "favicon": "https://flydenver.com/apple-touch-icon.png", "time_published": "2023-09-14T15:33:21Z" }, { "url": "https://en.wikipedia.org/wiki/Automated_Guideway_Transit_System_(Denver_International_Airport)", "title": "Automated Guideway Transit System (Denver International Airport)", "time_published": "2026-06-01T08:54:40Z" }, { "url": "https://en.wikipedia.org/wiki/Denver%20International%20Airport", "title": "Denver International Airport", "time_published": "2026-04-30T15:08:23Z" }, { "url": "https://www.faa.gov/?action=searchForAirport&airportcode=PSR", "title": "Federal Aviation Administration", "favicon": "https://www.faa.gov/themes/custom/faa/favicon.png", "time_published": "2026-07-17T12:00:00Z" } ] }, "q14": { "question": "Are there hotels or sleeping facilities at San Diego airport?", "answer": "San Diego International Airport does not have on-site hotels, capsule hotels, or sleeping pods. There are nearby hotels that offer free shuttle service for guests, though specific terminal locations and shuttle details aren't listed.", "toolsUsed": [ "article_lookup" ], "references": [ { "url": "https://www.sleepinginairports.net/guides/san-diego-airport-guide.htm", "title": "San Diego Airport Guide (SAN) - Sleeping in Airports", "time_published": "2018-08-06T08:49:44Z" }, { "url": "https://www.sleepinginairports.net/usa/sandiego.htm", "title": "San Diego Airport Guide (SAN) - Sleeping in Airports", "time_published": "2026-05-29T21:56:08Z" }, { "url": "http://www.san.org/parking-transportation/taxis", "title": "Travel Tips: Before You Go | San Diego International Airport", "time_published": "2025-10-10T18:09:11Z" }, { "url": "http://san.org/Flights", "title": "Arrivals - Check Flight Status | San Diego International Airport", "favicon": "https://cdn-iledcni.nitrocdn.com/MENtWJRLkriAtmpQmYbUxvjofqTlAYUZ/assets/images/optimized/rev-3854d1f/www.san.org/wp-content/uploads/2025/09/faviconArtboard-1.png", "time_published": "2026-05-12T02:59:40Z" }, { "url": "https://en.wikipedia.org/wiki/San%20Diego%20International%20Airport", "title": "San Diego International Airport", "time_published": "2026-04-30T18:34:10Z" }, { "url": "https://www.san.org/to-from/Rental-Cars", "title": "Rental Car Center - SAN Airport Ground Transportation", "favicon": "https://cdn-iledcni.nitrocdn.com/MENtWJRLkriAtmpQmYbUxvjofqTlAYUZ/assets/images/optimized/rev-309fb20/www.san.org/wp-content/uploads/2025/09/faviconArtboard-1.png", "time_published": "2025-07-11T21:19:17Z" } ] }, "q15": { "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at San Diego Intl Airport?", "answer": "San Diego International Airport (SAN) offers free, fast Wi‑Fi via the network “#SANfreewifi” in 2‑hour sessions — simply reconnect for additional time. Currency exchange offices are located on the departure and arrival levels in Terminal 1, Terminal 2, and the Rental Car Center; check terminal directories for exact locations. The airport also has six post‑security nursing/prayer rooms with handwashing stations, outlets, comfy seating, and soft lighting, though a dedicated chapel is not mentioned.", "toolsUsed": [ "article_lookup" ], "references": [ { "url": "https://www.san.org/media-resources/new-terminal-1-opens-at-san-diego-international-airport/", "title": "New Terminal 1 Opens at San Diego International Airport - SAN Airport", "time_published": "2025-10-02T00:00:00Z" }, { "url": "https://www.san.org/services-and-facilities/", "title": "Services and Facilities - SAN Airport", "favicon": "https://cdn-iledcni.nitrocdn.com/MENtWJRLkriAtmpQmYbUxvjofqTlAYUZ/assets/images/optimized/rev-e74dbd5/www.san.org/wp-content/uploads/2025/09/faviconArtboard-1.png", "time_published": "2025-07-11T21:33:11Z" }, { "url": "https://en.wikipedia.org/wiki/San_Diego_International_Airport", "title": "San Diego International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-18T11:44:51Z" }, { "url": "https://en.wikipedia.org/wiki/Transportation%20in%20San%20Diego", "title": "Transportation in San Diego", "time_published": "2026-02-27T03:32:46Z" }, { "url": "https://flysanantonio.com/business/about-saas/terminal-development/", "title": "Terminal Development - San Antonio International Airport", "time_published": "2025-10-02T15:50:57Z" } ] }, "q16": { "question": "Are there accessible services or children's facilities at the Denver and San Diego airports?", "answer": "At Denver International Airport (DEN), wheelchair services and disability accommodations are available by contacting your airline at least 48 hours before departure; the airport also accommodates service animals and provides accessible facilities, though specific children's play areas are not highlighted. At San Diego International Airport (SAN), wheelchair assistance can be arranged through your airline, and the airport offers the SAN Assist program for travelers with non-visible disabilities, with travel guides available upon request three business days in advance and familiarization tours two to three weeks ahead; TSA Cares can also be contacted 72 hours prior for security screening help. Neither airport explicitly mentions dedicated children's play areas in the provided accessibility information.", "toolsUsed": [ "article_lookup" ], "references": [ { "url": "https://www.flydenver.com/traveler_services/accessibility", "title": "Accessibility and Mobility | Denver International Airport", "time_published": "2026-04-02T20:29:43Z" }, { "url": "https://www.flydenver.com/event/61719/", "title": "| Denver International Airport", "favicon": "https://www.flydenver.com/apple-touch-icon.png", "time_published": "2026-07-09T15:14:02Z" }, { "url": "https://en.wikipedia.org/wiki/Automated_Guideway_Transit_System_(Denver_International_Airport)", "title": "Automated Guideway Transit System (Denver International Airport)", "time_published": "2026-06-01T08:54:40Z" }, { "url": "https://en.wikipedia.org/wiki/Denver%20International%20Airport", "title": "Denver International Airport", "time_published": "2026-04-30T15:08:23Z" }, { "url": "https://www.faa.gov/?action=searchForAirport&airportcode=PSR", "title": "Federal Aviation Administration", "favicon": "https://www.faa.gov/themes/custom/faa/favicon.png", "time_published": "2026-07-17T12:00:00Z" }, { "url": "https://www.san.org/accessibility/", "title": "Accessibility - SAN Airport", "favicon": "https://cdn-iledcni.nitrocdn.com/MENtWJRLkriAtmpQmYbUxvjofqTlAYUZ/assets/images/optimized/rev-e74dbd5/www.san.org/wp-content/uploads/2025/09/faviconArtboard-1.png", "time_published": "2025-07-11T21:31:52Z" }, { "url": "https://www.san.org/media-resources/san-diego-international-airport-launches-san-assist-program-to-support-travelers-with-non-visible-disabilities/", "title": "San Diego International Airport Launches SAN Assist Program to Support Travelers with Non-Visible Disabilities - SAN Airport", "time_published": "2026-02-25T00:38:38Z" }, { "url": "https://en.wikipedia.org/wiki/San_Diego_International_Airport", "title": "San Diego International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-18T11:44:51Z" }, { "url": "https://flysanantonio.com/home/at-the-airport/accessibility/", "title": "Accessibility - San Antonio International Airport", "time_published": "2024-10-18T21:07:58Z" }, { "url": "https://en.wikipedia.org/wiki/San%20Diego%20International%20Airport", "title": "San Diego International Airport", "time_published": "2026-04-30T18:34:10Z" } ] }, "q17": { "question": "What aircraft are typically used on flights from Denver to San Diego?", "answer": "The most common aircraft on nonstop flights from Denver to San Diego are Boeing 737 family jets, particularly the 737-800 and 737 MAX 8, flown by Southwest and Alaska Airlines. United also operates the route with Boeing 737-900s, 737 MAX 9s, and Airbus A321neos, while Alaska occasionally uses the Embraer 175. Specific aircraft types for some Frontier and Southwest flights aren't publicly listed, though the exact model can vary by day and airline; Wi‑Fi and seatback entertainment are widely available across these carriers.", "methodology": "Aircraft types are taken from the equipment each operating carrier schedules on this route, drawn from published airline timetables and airline equipment schedules in our flight-schedule database. They describe typical scheduled aircraft and can vary with seasonal or day-of-week assignments and last-minute equipment swaps.", "toolsUsed": [ "route_aircraft" ] }, "q18": { "question": "Which airline alliances serve flights from Denver to San Diego?", "answer": "United (Star Alliance) and Alaska Airlines (Oneworld) are the alliance carriers flying nonstop from Denver to San Diego. Southwest and Frontier also operate the route but belong to no alliance. No SkyTeam carrier flies it nonstop, though SkyTeam members may serve it via connections.", "methodology": "Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.", "toolsUsed": [ "route_airlines" ] }, "q20": { "question": "What are the best airport lounge options when departing from Denver?", "answer": "At Denver International Airport, the Centurion Lounge in Concourse C and the Delta Sky Club in the Main Terminal (Concourse A, 4th Floor) are the standout options. The Centurion Lounge is accessible with an American Express Platinum Card and features locally inspired cuisine and craft cocktails. The Delta Sky Club welcomes Delta Sky Club members, eligible premium cabin passengers, and certain elite status holders, offering premium food, beer and wine, and flight monitors.", "toolsUsed": [ "article_lookup" ], "references": [ { "url": "https://americanexpress.com/en-gb/travel/lounges/the-platinum-card/DEN", "title": "American Express Lounges at Denver International Airport | Amex GB", "time_published": "2026-05-03T00:00:00Z" }, { "url": "https://www.flydenver.com/", "title": "Denver International Airport | DEN", "favicon": "https://www.flydenver.com/apple-touch-icon.png", "time_published": "2026-06-02T21:34:27Z" }, { "url": "https://flydenver.com/at-the-airport", "title": "Exciting Things to Do at Denver International Airport", "time_published": "2026-02-18T15:39:31Z" }, { "url": "https://www.americanexpress.com/en-us/travel/lounges/the-centurion-card-idc-en/DEN/Delta-Sky-Club-Main-Terminal-Concourse-A-IgRTEiZDls/", "title": "Delta Sky Club at Denver International Airport | Amex US", "time_published": "2026-03-18T00:00:00Z" }, { "url": "https://carsandstays.delta.com/Denver-Hotels-Sleep-Inn-Suites-Denver-International-Airport.h23533743.Hotel-Information?categorySearch=any_option&chkin=2026-07-06&chkout=2026-07-07&destType=MARKET&destination=Denver%2C+CO%2C+United+States+of+America+%28DEN-All+Airports%29&latLong=39.74483000000001%2C-104.94829500000002&pwa_ts=1782175590171&referrerUrl=aHR0cHM6Ly9jYXJzYW5kc3RheXMuZGVsdGEuY29tL0hvdGVsLVNlYXJjaA%3D%3D®ionId=6139084&rfrr=HSR&rm1=a2&searchId=b9103c12-38ab-46f5-86a7-f3447411bdbe&selectedRatePlan=383244565&selectedRoomType=218717901&sort=RECOMMENDED&top_cur=USD&top_dp=126&useRewards=false&x_pwa=1", "title": "Sleep Inn & Suites Denver International Airport", "favicon": "https://carsandstays.delta.com/favicon.ico", "time_published": "2026-06-23T09:32:24Z" } ] }, "q21": { "question": "What is the baggage allowance on this route from Denver to San Diego?", "answer": "Baggage allowance varies by airline and fare. Basic economy on this domestic route typically does not include a free checked bag, though a carry-on is usually permitted. Standard economy fares may still charge for checked bags, so check your specific airline's policy." }, "q22": { "question": "What cabin and seat options are typical from Denver to San Diego?", "answer": "On Denver to San Diego flights, Economy is standard with extra‑legroom options, Premium Economy is uncommon, and Business class typically has recliner seats rather than flat‑beds." }, "q23": { "question": "Are same‑day changes or standby possible on this route?", "answer": "Policies depend on the airline and fare type; flexible and premium tickets generally allow same‑day changes or standby, while Basic Economy typically does not." } } } }