{"response": {"Key": "DEN-SEA", "orig": {"code": "DEN", "type": "airport", "city": "Denver", "fullCity": "Denver, Colorado", "airport": "Denver Intl Airport"}, "dest": {"code": "SEA", "type": "airport", "city": "Seattle", "fullCity": "Seattle, Washington", "airport": "Seattle-Tacoma Intl Airport"}, "faq": {"q0": {"question": "What is the typical flight duration from Denver to Seattle?", "answer": "The flight from Denver to Seattle is about 1,020 miles and typically takes 3 hours. In the other direction, the return is about 15 minutes shorter at 2 hours 45 minutes.", "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"]}, "q1": {"question": "Are there any direct flights from Denver to Seattle?", "answer": "Yes, there are plenty of direct flights from Denver to Seattle. Five airlines operate non‑stop service: Southwest (124 flights per week), Alaska (110), United (105), Delta (64), and Frontier (24), all running daily schedules. With over 400 weekly non‑stop flights across the carriers, you can fly any day of the week at nearly any hour from early morning through late evening.", "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"]}, "q3": {"question": "What are the ground transportation options in Seattle?", "answer": "From Seattle-Tacoma International Airport, the Link light rail provides a direct 40‑minute ride to downtown’s Westlake Station and is the most‑used option. Metered taxis and ride‑share services like Uber and Lyft pick up on the third floor of the parking garage and offer door‑to‑door convenience in about 30–45 minutes. Rental cars are available at an off‑site facility via free 24‑hour shuttles, and several shared‑van and charter‑bus services also operate from the airport. The light rail is the fastest during peak traffic, while taxis and ride‑shares are the most flexible.", "toolsUsed": [], "references": [{"url": "https://www.portseattle.org/blog/smooth-sailing-guide-between-sea-airport-and-seattle-cruise-terminals", "title": "Smooth Sailing Guide between SEA Airport and the Seattle Cruise Terminals | Port of Seattle", "time_published": "2025-05-05T00:00:00Z"}, {"url": "https://www.portseattle.org/blog/wander-while-you-wait-exploring-beyond-sea", "title": "Wander While You Wait — Exploring Beyond SEA | Port of Seattle", "time_published": "2025-08-18T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/SeaTac_Airport", "title": "Seattle–Tacoma International Airport - Wikipedia", "time_published": "2003-07-10T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/Seattle%E2%80%93Tacoma%20International%20Airport", "title": "Seattle–Tacoma International Airport", "time_published": "2026-04-29T19:20:41Z"}, {"url": "http://www.portseattle.org/exploremore?page=1&tid=125", "title": "Explore More List | Port of Seattle", "time_published": "2000-01-01T00:00:00Z"}]}, "q4": {"question": "When is the cheapest time to fly from Denver to Seattle?", "answer": "The cheapest months to fly from Denver to Seattle are October, March, and April, with average fares around $242–$248. The most expensive months are June, July, and November, where average prices climb to $309–$333.", "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 Seattle?", "answer": "For the Denver to Seattle route, the best fares typically appear when booking 4–6 weeks ahead, with the absolute lowest price around 25 days before departure. During peak summer and holiday periods, prices rise and the ideal window shifts earlier — booking 6–8 weeks out helps avoid the steepest markups.", "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 Seattle?", "answer": "Yes, overnight red‑eye flights are available nonstop from Denver to Seattle. Southwest offers the most with up to 23 weekly red‑eyes departing daily between about 9:15 PM and 10:50 PM, while United, Frontier, and Alaska also operate red‑eyes on select evenings with departures roughly between 9:00 PM and 10:30 PM. The flight is short — around 2.5 to 3 hours — so these late departures typically land in Seattle the same night, before midnight Pacific time.", "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 Seattle?", "answer": "Southwest, Alaska, United, Delta, and Frontier all fly nonstop from Denver to Seattle. Southwest leads with 124 weekly flights, Alaska runs 110, United 105, and Delta 64, while Frontier offers 24. Typical median fares are around $328 on Southwest, $312 on Alaska, $392 on United, $318 on Delta, and $212 on Frontier, which is the low-fare leader.", "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 Seattle?", "answer": "Common layovers include Salt Lake City, Portland, San Francisco and Phoenix, which offer broad connections and efficient transfers."}, "q9": {"question": "How reliable are on‑time departures on this route from Denver to Seattle?", "answer": "On-time departure rates on this route vary by carrier: Delta and United lead at 77% and 78% respectively with minimal delays, while Southwest is lower at 62% and a median delay of 8 minutes. Alaska sits in between at 68% on-time with a 1% cancellation rate.", "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 Seattle?", "answer": "July through September offers the driest, sunniest weather and pleasant temperatures with fewer tourists than peak summer months."}, "q11": {"question": "What documents should I bring with me to the airport when flying from Denver to Seattle?", "answer": "For this domestic U.S. flight, bring a Real ID-compliant driver's license or passport, ensure the name matches your ticket, and have a payment method for any baggage fees. Proof of onward travel and vaccinations are not required within the United States."}, "q12": {"question": "Which airport should I use in Seattle?", "answer": "Seattle-Tacoma International Airport is the primary commercial airport serving the Seattle area. It is located about 14 miles south of downtown, offers extensive domestic and international connections, and is a major hub for Alaska Airlines and Delta Air Lines. No other airport in the city handles scheduled passenger flights."}, "q13": {"question": "How do I get to Denver Intl Airport from the city center?", "answer": "From downtown Denver, the most popular and fastest way to reach Denver International Airport is the RTD A‑Line commuter train, which departs from Denver Union Station and takes about 37 minutes. Ride‑share services like Uber and Lyft, along with taxis, offer door‑to‑door convenience but are generally more expensive and subject to traffic, especially during peak hours. Several shared‑van shuttle companies also run scheduled service from downtown hotels and locations. If you drive yourself, the airport is about a 25‑mile trip northeast of downtown, with ample on‑site parking lots ranging from economy to premium reserved spaces.", "toolsUsed": [], "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 Seattle airport?", "answer": "Seattle-Tacoma International Airport (SEA) does not have on-site hotels, capsule hotels, or sleeping pods inside the terminals. Several nearby hotels like the Seattle Airport Marriott and Residence Inn by Marriott are connected by complimentary shuttle service, located less than a mile from the airport.", "toolsUsed": [], "references": [{"url": "https://sleepinginairports.net/guides/seattle-airport-guide.htm", "title": "Seattle Airport Guide (SEA) - Sleeping in Airports", "favicon": "https://www.sleepinginairports.net/nitropack_static/oBWrHkPujHTPIaVWqdDSDhClXUyrYhhb/assets/images/optimized/rev-b853180/www.sleepinginairports.net/wp-content/uploads/2018/09/cropped-sia-logo-180x180.png", "time_published": "2018-08-08T19:18:01Z"}, {"url": "https://www.marriott.com/en-us/hotels/seara-residence-inn-seattle-sea-tac-airport/overview/?scid=f2ae0541-1279-4f24-b197-a979c79310b0", "title": "Airport Shuttle & Near SEA | Residence Inn Seattle Sea-Tac Airport", "time_published": "2025-02-19T00:00:00Z"}, {"url": "http://www.portseattle.org/Sea-Tac/Pages/default.aspx", "title": "Seattle-Tacoma International Airport | Port of Seattle", "time_published": "2026-04-18T00:00:00Z"}, {"url": "https://www.marriott.com/en-us/hotels/seawa-seattle-airport-marriott/overview/?gclid=Cj0KCQjw0PWRBhDKARIsAPKHFGhmUt2mC-WobK99kCuOjPMPOWiTky6Ue8-pBic_4rzWZjScsYnFkwcaAtlOEALw_wcB&gclsrc=aw.ds", "title": "Hotel close to SeaTac | Seattle Airport Marriott", "time_published": "2023-08-11T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/Seattle%E2%80%93Tacoma%20International%20Airport", "title": "Seattle–Tacoma International Airport", "time_published": "2026-04-29T19:20:41Z"}, {"url": "https://www.marriott.com/en-us/hotels/seara-residence-inn-seattle-sea-tac-airport/overview/", "title": "Hotel near Sea-Tac Airport | Residence Inn by Marriott", "time_published": "2024-10-11T00:00:00Z"}]}, "q17": {"question": "What aircraft are typically used on flights from Denver to Seattle?", "answer": "On the Denver–Seattle route the most common aircraft are the Boeing 737 MAX 8 (flown by Southwest and United) and the Boeing 737-800 (Alaska and United). The Boeing 737-900, 737 MAX 9, and Airbus A321-200 Neo also appear on some United and Alaska flights, while Frontier’s equipment is not publicly specified. The exact aircraft can vary by day and airline, but the 737 family dominates the nonstop service.", "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 Seattle?", "answer": "Nonstop flights from Denver to Seattle are operated by Alaska Airlines (Oneworld), United (Star Alliance), Delta (SkyTeam), Southwest, and Frontier. Southwest and Frontier are not part of any global alliance.", "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", "article_lookup"]}, "q20": {"question": "What are the best airport lounge options when departing from Denver?", "answer": "Denver International Airport has a Delta Sky Club in the Main Terminal, Concourse A on the 4th floor, accessible to Delta One, SkyTeam Premium Cabin, and Sky Club members up to three hours before departure. It offers premium food, a full bar with beer and wine, Wi-Fi, and flight monitors. There is also a Centurion Lounge in Concourse C, available to American Express Platinum and Centurion cardholders, featuring locally inspired cuisine and craft cocktails.", "toolsUsed": [], "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&regionId=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 Seattle?", "answer": "Baggage allowance on Denver to Seattle flights depends on the airline and fare class. Basic economy often excludes a checked bag but includes a personal item, while standard economy typically allows a carry‑on and charges for checked bags. Check your specific airline's policy."}, "q22": {"question": "What cabin and seat options are typical from Denver to Seattle?", "answer": "On this domestic route, most airlines offer Economy and recliner-style First Class; flat-bed Business and Premium Economy are not typical."}, "q23": {"question": "Are same‑day changes or standby possible on this route?", "answer": "Policies differ by airline; flexible and premium tickets often allow same‑day changes or standby, while Basic Economy typically does not."}}}}