{ "response": { "Key": "DEN-CPH", "orig": { "code": "DEN", "type": "airport", "city": "Denver", "fullCity": "Denver, Colorado", "airport": "Denver Intl Airport" }, "dest": { "code": "CPH", "type": "airport", "city": "Copenhagen", "fullCity": "Copenhagen, Denmark", "airport": "Kastrup Airport" }, "faq": { "q0": { "question": "What is the typical flight duration from Denver to Copenhagen?", "answer": "A nonstop flight from Denver (DEN) to Copenhagen (CPH) typically takes around 9 hours 15 minutes to 9 hours 30 minutes. With one stop, common layover cities like Reykjavik (KEF) or Frankfurt (FRA) bring total travel time to roughly 12 to 15 hours. The return flight from Copenhagen to Denver is usually shorter by about 30–60 minutes due to prevailing winds." }, "q1": { "question": "Are there any direct flights from Denver to Copenhagen?", "answer": "There are no nonstop flights from Denver to Copenhagen. The quickest one-stop routings connect through Frankfurt (Lufthansa, about 11 hours total with a short layover) or Reykjavik (Icelandair, roughly 11 hours 45 minutes). SAS also serves the route via connecting hubs in Europe, with typical total travel times around 12 to 14 hours.", "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" ] }, "q2": { "question": "Are there visa requirements to travel from Denver to Copenhagen?", "answer": "Yes — visa requirements for flying from Denver to Copenhagen depend on your citizenship. If you are a U.S. citizen, you can enter Denmark (and the Schengen Area) without a visa for short stays of up to 90 days within any 180-day period for tourism or business. If you are a Danish citizen, you can travel to the U.S. under the Visa Waiver Program if you have a valid ESTA authorization. If you are a national of another country, you must check Denmark's visa rules for your nationality. For the return from Copenhagen to Denver, a visa or ESTA may be required depending on your citizenship." }, "q3": { "question": "What are the ground transportation options in Copenhagen?", "answer": "The fastest and most-used option from Copenhagen Airport to the city center is the metro, which runs 24/7 and reaches downtown in about 15 minutes. Regional trains also serve the airport, taking roughly the same time to Copenhagen Central Station. Several bus lines connect to the city and beyond, including FlixBus and other coach services. Taxis are available at the terminals, and ride-sharing services operate in the area. Car rentals are offered on-site from major companies like Avis, Hertz, and Sixt.", "toolsUsed": [], "references": [ { "url": "https://cph.dk/en/parking-transport/bus-train-metro-taxi/terminal-bus-old", "title": "The terminal bus at Copenhagen Airport | CPH", "time_published": "2026-03-18T00:00:00Z" }, { "url": "https://www.cph.dk/en/parking-transport/bus-train-metro-taxi", "title": "Buses, trains, metro and taxi", "favicon": "https://www.cph.dk/495324/globalassets/1.-frontpage/cph_icon_blue_rgb.png?format=webp" }, { "url": "https://en.wikipedia.org/wiki/Copenhagen_City_Airport", "title": "Copenhagen City Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-09T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/Copenhagen_Airport", "title": "Copenhagen Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-15T16:10:30Z" }, { "url": "https://www.cph.dk/en/parking-transport/bus-train-metro-taxi/bus", "title": "Buses to and from Copenhagen Airport", "time_published": "2026-03-18T00:00:00Z" } ] }, "q4": { "question": "When is the cheapest time to fly from Denver to Copenhagen?", "answer": "The cheapest months to fly from Denver to Copenhagen are November (average $660), October ($706), and January ($718), while June is the most expensive at $1,164 on average, followed by July ($1,040) and May ($903).", "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 Copenhagen?", "answer": "For flights from Denver to Copenhagen, the best time to book is about 23 to 26 weeks before departure, when average fares are around $831. The absolute cheapest single day to book is 180 days out at $794, while last-minute bookings can climb to $1,028 or more. For summer and holiday travel, it's wise to stick to the early end of that window or even a bit sooner, as demand pushes prices higher closer to departure.", "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 Copenhagen?", "answer": "Overnight (red‑eye) flights from Denver to Copenhagen are available only as connecting itineraries — no nonstop red‑eyes operate on this route. The long overnight leg departs Denver in the late afternoon to late evening, most commonly around 4:15–8:10 PM on Lufthansa via Frankfurt or Munich, British Airways via London Heathrow, or Icelandair via Keflavík, with arrival at the European hub between 6:00 AM and 11:15 AM local time (the next morning for the 6:00–10:35 AM arrivals, same morning for the 11:15 AM arrival in Frankfurt).", "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 Copenhagen?", "answer": "There is no nonstop service from Denver to Copenhagen. The most common one‑stop routings are on Lufthansa via Frankfurt (about 8 flights a day), Icelandair via Reykjavík (about 7), American via Philadelphia (about 6), and British Airways via London Heathrow (about 5). Other options include Air Canada via Toronto or Montreal, and United via Munich. Typical per‑carrier fares are not available for this route.", "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 Copenhagen?", "answer": "Common layover cities include Frankfurt, Amsterdam, London, and Reykjavik. Frankfurt and Amsterdam offer extensive connections and efficient transfers, while Reykjavik provides a shorter route with visa‑free transit. London Heathrow is a major hub but may require a terminal change; ensure your passport allows entry if needed." }, "q9": { "question": "How reliable are on‑time departures on this route from Denver to Copenhagen?", "answer": "On-time reliability is generally good, though afternoon thunderstorms at Denver can cause delays. Early morning departures, particularly on SAS or United, offer the best chance for punctuality." }, "q10": { "question": "Which months have the best weather for traveling to Copenhagen?", "answer": "May through June and September offer pleasant temperatures, long daylight hours, and fewer tourists than the summer peak." }, "q11": { "question": "What documents should I bring with me to the airport when flying from Denver to Copenhagen?", "answer": "Bring a passport valid for at least three months beyond your planned stay, proof of onward travel, and if not visa-exempt, a valid Schengen visa. Starting in 2025, you’ll need an ETIAS travel authorization. Also carry a payment method for bags and any required vaccination certificates." }, "q12": { "question": "Which airport should I use in Copenhagen?", "answer": "Copenhagen has only one commercial airport, Copenhagen Airport (CPH), located about 8 kilometers south of the city center, with easy metro and train connections to downtown and major attractions." }, "q13": { "question": "How do I get to Denver Intl Airport from the city center?", "answer": "From downtown Denver, the most popular option is the RTD A‑Line commuter train, which runs directly from Union Station to the airport transit center in about 37 minutes. Ride‑share services like Uber and Lyft, as well as taxis, offer door‑to‑door convenience with a typical drive time of 30–45 minutes depending on traffic. Several shared‑van and shuttle services also serve the airport, and driving yourself is possible with various on‑airport parking lots available, though the train is generally the fastest and most cost‑effective choice.", "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 Copenhagen airport?", "answer": "Copenhagen Airport has the Clarion Hotel directly connected to Terminal 3, just steps from the terminals, with no shuttle required. There are no capsule hotels or sleeping pods inside the airport, but the Clarion offers soundproofed rooms with runway views. Several other nearby hotels are available via a short shuttle ride.", "toolsUsed": [], "references": [ { "url": "https://www.sleepinginairports.net/reviews/copenhagen-kastrup-airport-reviews.htm", "title": "Copenhagen Kastrup Airport Reviews (CPH)", "time_published": "2025-10-02T00:00:00Z" }, { "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": "http://cph.dk/en/hotels/clarion-hotel-copenhagen-airport", "title": "Clarion Hotel Copenhagen Airport", "time_published": "2026-03-18T00:00:00Z" }, { "url": "http://activities.marriott.com/europe/denmark/copenhagen/activities/private_transfer_copenhagen_airport_cph_to_copenhagen_by_sedan-XPDIF7?property=CPHCF", "title": "Private Transfer Copenhagen Airport CPH to Copenhagen by Sedan", "time_published": "2026-04-07T00:00:00Z" }, { "url": "http://activities.marriott.com/europe/denmark/copenhagen/activities/luxury_vehicle_transfer_from_copenhagen_airport_cph_to_copenhagen-X3DMMK?property=CPHLF", "title": "Luxury Vehicle Transfer from Copenhagen Airport CPH to Copenhagen", "time_published": "2026-04-05T00:00:00Z" }, { "url": "https://www.sleepinginairports.net/guides/copenhagen-kastrup-airport-guide.htm", "title": "Copenhagen Kastrup Airport Guide (CPH) - 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": "2018-08-23T20:08:42Z" } ] }, "q16": { "question": "Are there accessible services or children's facilities at the Denver and Copenhagen airports?", "answer": "At Denver International Airport, passengers with disabilities can request wheelchair service through their airline at least 48 hours before departure, and the airport's Automated Guideway Transit System provides accessible connections between the terminal and concourses. Copenhagen Airport offers a dedicated assistance service operated by Falck, which can be booked via the airline or travel agency—ideally at least 48 hours in advance for needs like electric wheelchairs or service dogs—and covers mobility, visual, and hearing support. Both airports welcome service animals, though specific children's play areas are not mentioned in the accessible services information.", "toolsUsed": [], "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.cph.dk/en/practical/passengers-with-disabilities", "title": "Passengers with disabilities", "time_published": "2025-12-16T00:00:00Z" }, { "url": "http://cph.dk/en/hotels/clarion-hotel-copenhagen-airport", "title": "Clarion Hotel Copenhagen Airport", "time_published": "2026-03-18T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/Copenhagen_Airport_railway_station", "title": "Copenhagen Airport railway station", "time_published": "2026-03-23T10:56:06Z" }, { "url": "https://en.wikipedia.org/wiki/Copenhagen_City_Airport", "title": "Copenhagen City Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-09T00:00:00Z" }, { "url": "https://cph.dk/en/about-cph/press/news/2025/11/more travellers than ever at copenhagen airport", "title": "More travellers than ever at Copenhagen Airport", "favicon": "https://www.cph.dk/495324/globalassets/1.-frontpage/cph_icon_blue_rgb.png?format=webp", "time_published": "2025-11-12T00:00:00Z" } ] }, "q17": { "question": "What aircraft are typically used on flights from Denver to Copenhagen?", "answer": "There is no nonstop service from Denver to Copenhagen, so all flights connect. On the long transatlantic leg, the most common aircraft are the Airbus A350-900 (via Frankfurt on Lufthansa), the Boeing 757-200 (via Reykjavík on Icelandair), and the Airbus A380-800 (via Munich on Lufthansa); Boeing 787 variants, 777-200LRs, and 767-300s also appear on other connecting routings. The exact aircraft depends on the airline and connection point, and varies day to day. Wi‑Fi and seatback entertainment are widely available on these long‑haul aircraft, though the specifics differ by carrier.", "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 Copenhagen?", "answer": "There is no nonstop service between Denver and Copenhagen. One-stop itineraries are offered by carriers from all three major alliances: Star Alliance (Lufthansa, United, Air Canada, and Turkish Airlines), oneworld (American Airlines and British Airways), and SkyTeam (Delta). Icelandair also connects via Reykjavik but belongs to no 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. 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. 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_airlines", "flight_schedule", "route_aircraft" ] }, "q20": { "question": "What are the best airport lounge options when departing from Denver?", "answer": "At Denver International Airport (DEN), you’ll find the Delta Sky Club on the 4th floor of Concourse A’s center core, accessible with a same-day Delta boarding pass, qualifying elite status, or a Delta Sky Club membership, and offering premium food, beer and wine, and Wi-Fi. The Centurion Lounge is located in Concourse C and welcomes American Express Platinum and Centurion cardholders, along with their guests, providing a full bar, locally inspired cuisine, and comfortable seating. These are the two primary lounges you can confidently rely on at DEN.", "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®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 Copenhagen?", "answer": "Baggage rules depend on the airline and fare class. Basic economy often excludes checked luggage, while standard economy typically includes one checked bag and a carry-on. Premium cabins offer more generous allowances." }, "q22": { "question": "What cabin and seat options are typical from Denver to Copenhagen?", "answer": "Flights from Denver to Copenhagen typically offer Economy and flat‑bed Business class. Premium Economy is available on select carriers; First class is not common." }, "q23": { "question": "Are same‑day changes or standby possible on this route?", "answer": "Policies vary by airline and fare; flexible and premium‑cabin tickets often allow same‑day changes or standby, while Basic Economy typically does not." } } } }