{ "response": { "Key": "CHI-DEN", "orig": { "code": "CHI", "type": "airport", "city": "Chicago", "fullCity": "Chicago, Illinois", "airport": "Dupage County" }, "dest": { "code": "DEN", "type": "airport", "city": "Denver", "fullCity": "Denver, Colorado", "airport": "Denver Intl Airport" }, "faq": { "q0": { "question": "What is the typical flight duration from Chicago to Denver?", "answer": "A nonstop flight from Chicago (ORD or MDW) to Denver typically takes about 2 hours 45 minutes to 3 hours. Due to prevailing winds, the return flight from Denver to Chicago is often slightly shorter, around 2 hours 30 minutes to 2 hours 45 minutes. Flights with a layover can extend total travel time to 4 to 6 hours or more, depending on the connection." }, "q1": { "question": "Are there any direct flights from Chicago to Denver?", "answer": "Yes, there are plenty of direct flights from Chicago to Denver. Southwest, United, American, and Frontier all fly non‑stop daily from either Midway or O'Hare, combining for over 600 weekly departures. United alone offers up to 27 flights a day from O'Hare, and Southwest runs more than 30 from Midway, so you have frequent options all week long.", "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. Carrier service and weekly frequencies are summarized 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). Where available, on-time and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, and typical fares from the U.S. DOT Airline Origin and Destination Survey (DB1B), a quarterly 10% sample of tickets sold.", "toolsUsed": [ "route_airlines", "flight_schedule" ] }, "q3": { "question": "What are the ground transportation options in Denver?", "answer": "From Denver International Airport, the A Line commuter rail is the most direct and widely used connection to downtown, reaching Union Station in about 37 minutes. Taxis, ride shares (Uber/Lyft), and rental cars are also readily available at the Jeppesen Terminal, while regional buses serve the Airport Transit Center. The airport’s remote location makes the train the fastest and most reliable option for avoiding traffic, and it’s the top choice for most travelers heading to the city center.", "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" } ] }, "q4": { "question": "When is the cheapest time to fly from Chicago to Denver?", "answer": "The cheapest months to fly from Chicago to Denver are October, September, and August, with average fares as low as $232 in October. The most expensive months are December, June, and November, with December averaging $379.", "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 Chicago to Denver?", "answer": "For flights from Chicago to Denver, the best fares are usually found when booking 4 to 6 weeks ahead, with an average price around $155. The absolute lowest price appears about 25 days out, while last-minute tickets can cost over $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 Chicago to Denver?", "answer": "Yes, overnight red-eye flights are available from Chicago to Denver. United offers daily late-evening nonstops from O'Hare departing around 9:15–9:44 PM, American runs a daily 9:45 PM departure from O'Hare, and Southwest operates several daily red-eyes from Midway between 9:20 PM and 10:55 PM. These flights arrive in Denver around midnight or in the early hours of the same night (typically before 1 AM Mountain Time), so they land the same evening rather than the next morning.", "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 Chicago to Denver?", "answer": "Southwest, United, American, and Frontier all fly nonstop from Chicago to Denver. Southwest operates the most flights at 273 per week — 219 from Midway and 54 from O'Hare — followed by United with 187 weekly flights and American with 121, both from O'Hare. Frontier runs 46 weekly nonstops, split between O'Hare (26) and Midway (20). Median fares cluster around $147–$179 for Frontier and Southwest, while United and American fares are not listed here.", "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 Chicago and Denver?", "answer": "This is a domestic route with many non‑stop options, so connections are rarely needed. If you do connect, common hubs are Minneapolis‑St. Paul, Kansas City, and St. Louis, which offer efficient transfers and keep total travel time competitive." }, "q9": { "question": "How reliable are on‑time departures on this route from Chicago to Denver?", "answer": "On-time performance is generally good, though O'Hare can experience delays. Early flights on United and Southwest often have the best reliability." }, "q10": { "question": "Which months have the best weather for traveling to Denver?", "answer": "May, June, and September offer pleasant temperatures and fewer tourists than summer." }, "q11": { "question": "What documents should I bring with me to the airport when flying from Chicago to Denver?", "answer": "For this domestic U.S. flight, bring a Real ID or passport. No visa or proof of onward travel is needed. Have a payment method for bags and any required vaccination certificates." }, "q12": { "question": "Which airport should I use in Denver?", "answer": "Denver International Airport is the only commercial airport serving the city, located about 25 miles northeast of downtown. It is a major hub for United and Southwest, offering extensive domestic connections and some international routes. It suits all travel purposes, from business to leisure, with direct rail service to downtown Denver." }, "q13": { "question": "How do I get to Dupage County from the city center?", "answer": "DuPage Airport (DPA) is a general aviation airport about 29 miles west of downtown Chicago, so it's primarily reachable by car or ride-share. There is no direct public transit link from the city center, but you can take a Metra train to West Chicago or a Pace bus to a nearby stop and then use a taxi or ride-share for the final leg. Driving is the most popular option, with parking available on-site, and ride-share or taxi provide a door-to-door alternative. Driving typically takes 40–60 minutes in moderate traffic, while public transit plus a short ride-share can take well over an hour.", "toolsUsed": [], "references": [ { "url": "https://en.wikipedia.org/wiki/DuPage_Airport", "title": "DuPage Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-16T20:45:00Z" }, { "url": "https://en.wikipedia.org/wiki/Transportation_in_Chicago", "title": "Transportation in Chicago", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-05-15T02:56:07Z" }, { "url": "https://en.wikipedia.org/wiki/DuPage%20Airport", "title": "DuPage Airport", "time_published": "2026-03-13T22:38:40Z" }, { "url": "https://en.wikipedia.org/wiki/Transportation%20in%20Chicago", "title": "Transportation in Chicago", "time_published": "2026-04-13T06:59:09Z" }, { "url": "https://en.wikipedia.org/wiki/Chicago%20Executive%20Airport", "title": "Chicago Executive Airport", "time_published": "2026-03-26T11:15:20Z" } ] }, "q14": { "question": "Are there hotels or sleeping facilities at Denver airport?", "answer": "Denver International Airport does not have on-site hotels, capsule hotels, or sleeping pods inside the terminal. The airport is located about 25 miles from downtown Denver, and many nearby hotels are actually in Aurora, with most offering free shuttle service. For a comfortable rest, you'll need to take a short shuttle ride to one of the off-airport hotels.", "toolsUsed": [], "references": [ { "url": "https://sleepinginairports.net/airport-hotels/transit-hotels.htm", "title": "Transit Hotels – 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": "2026-06-22T14:15:16Z" }, { "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": "https://www.flydenver.com/job/job_posting-3-72824/", "title": "Airport Operations Supervisor | Denver International Airport", "time_published": "2026-05-12T09:00:46Z" }, { "url": "https://www.flydenver.com/job/job_posting-3-73608/", "title": "Airport Call Center Supervisor - Denver International Airport | Denver International Airport", "favicon": "https://www.flydenver.com/apple-touch-icon.png", "time_published": "2026-06-16T09:00:36Z" }, { "url": "https://en.wikipedia.org/wiki/Denver%20International%20Airport", "title": "Denver International Airport", "time_published": "2026-04-30T15:08:23Z" }, { "url": "https://www.flydenver.com/job/job_posting-3-73478/", "title": "Terminal Operations Officer - Denver International Airport | Denver International Airport", "favicon": "https://www.flydenver.com/apple-touch-icon.png", "time_published": "2026-06-16T09:00:44Z" } ] }, "q15": { "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Denver Intl Airport?", "answer": "Denver International Airport offers free Wi‑Fi throughout the terminal and concourses — just connect to one of the available DEN Wi‑Fi networks. Currency exchange services are available at multiple locations, including a full‑service branch in the Jeppesen Terminal and kiosks on the concourses. The airport also provides an interfaith chapel and a prayer room, both located in the Jeppesen Terminal, for quiet reflection or worship.", "toolsUsed": [], "references": [ { "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://en.wikipedia.org/wiki/Denver%20International%20Airport", "title": "Denver International Airport", "time_published": "2026-04-30T15:08:23Z" }, { "url": "https://en.wikipedia.org/wiki/Denver_Airport_station", "title": "Denver Airport station", "time_published": "2026-03-10T05:58:05Z" }, { "url": "https://sua.faa.gov/sua/siteFrame.app?lat=36.30&layers=BTTTTTTT&lon=-97.00&zoom=2.00", "title": "Special Use Airspace & Air Traffic Control Assigned Airspace - Graphic Map", "time_published": "2026-07-19T00:00:00Z" } ] }, "q17": { "question": "What aircraft are typically used on flights from Chicago to Denver?", "answer": "The Chicago–Denver route is dominated by Boeing 737s: the 737-800 (flown by Southwest and American), the 737-900 (United), and the 737 MAX 8 (Southwest) are all common, along with United's Airbus A321neo. Frontier and Southwest also operate some flights where the aircraft type isn't publicly specified, and the exact model can vary by day and airline. Wi-Fi and seatback entertainment are widely available on this heavily served corridor, though the specific offering depends on the carrier and aircraft.", "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 Chicago to Denver?", "answer": "United (Star Alliance) and American (oneworld) fly nonstop from Chicago to Denver, while Southwest and Frontier also operate the route but belong to no alliance. No SkyTeam carrier flies nonstop, though SkyTeam and other alliances 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" ] }, "q21": { "question": "What is the baggage allowance on this route from Chicago to Denver?", "answer": "On domestic flights like Chicago to Denver, basic economy fares often exclude a carry‑on and charge for checked bags. Standard economy typically includes a carry‑on but may still charge for checked bags, while higher fares or elite status may include free checked bags." }, "q22": { "question": "What cabin and seat options are typical from Chicago to Denver?", "answer": "On flights from Chicago to Denver, you'll generally find Economy and occasionally Economy Plus with extra legroom, but Premium Economy and flat-bed Business are not typical for this short domestic route." }, "q23": { "question": "Are same‑day changes or standby possible on this route?", "answer": "Policies vary by airline and fare; fully flexible and premium cabin tickets often allow same‑day changes or standby, while basic economy rarely does." } } } }