{ "response": { "Key": "CUN-STL", "orig": { "code": "CUN", "type": "airport", "city": "Cancún", "fullCity": "Cancún, Quintana Roo", "airport": "Cancún Intl Airport" }, "dest": { "code": "STL", "type": "airport", "city": "St. Louis", "fullCity": "St. Louis, Missouri", "airport": "Lambert Intl Airport" }, "faq": { "q0": { "question": "What is the typical flight duration from Cancún to St. Louis?", "answer": "Nonstop flights from Cancún (CUN) to St. Louis (STL) take approximately 3 hours 15 minutes. If you have a layover, the most common connecting cities like Houston, Dallas, or Atlanta will extend your total travel time to between 5 and 7 hours. Return flights from St. Louis to Cancún are slightly shorter, often around 3 hours due to tailwinds." }, "q1": { "question": "Are there any direct flights from Cancún to St. Louis?", "answer": "Yes, there are nonstop flights from Cancún to St. Louis. Southwest operates up to 37 flights a week daily, Frontier flies twice daily, and American has two Saturday-only departures. Southwest offers the most frequency with departures spread from mid-morning through mid-afternoon, while Frontier and American have late-morning flights.", "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. 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": [ "route_airlines", "flight_schedule", "redeye_flights" ] }, "q2": { "question": "Are there visa requirements to travel from Cancún to St. Louis?", "answer": "Yes, visa requirements apply for travel from Cancún to St. Louis. U.S. citizens do not need a visa to enter the U.S., but must present a valid passport. Mexican citizens require a visa to enter the U.S. unless they hold a valid U.S. visa or are eligible for the Visa Waiver Program (which Mexico is not part of). Other nationalities should check U.S. entry requirements based on their citizenship. For the return from St. Louis to Cancún, U.S. citizens do not need a visa for tourist stays up to 180 days, but all travelers must have a valid passport. Mexican citizens can enter Mexico without a visa, but need a valid passport. Other nationalities may require a visa or electronic authorization for Mexico." }, "q3": { "question": "What are the ground transportation options in St. Louis?", "answer": "St. Louis Lambert International Airport (STL) offers several ground transportation options to downtown, about 14 miles away. The MetroLink light rail is the most-used and fastest option, providing direct, economical service to the city center. Taxis, ride-sharing services like Uber and Lyft, and numerous car rental agencies are also readily available at the terminals. The light rail is generally the best balance of speed and cost, while ride-shares and taxis offer door-to-door convenience.", "toolsUsed": [], "references": [ { "url": "https://airport.guide/kstl", "title": "St Louis Airport (STL) | Terminal maps | Airport guide", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://www.airport.guide/kstl", "title": "St Louis Airport (STL) | Terminal maps | Airport guide", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/St._Louis_Lambert_International_Airport", "title": "St. Louis Lambert International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-15T19:57:22Z" }, { "url": "https://en.wikipedia.org/wiki/St.%20Louis%20Airport", "title": "St. Louis Airport", "time_published": "2022-05-18T03:16:52Z" }, { "url": "https://www.airport.guide/kstl/parking", "title": "St Louis Airport (STL) Parking Rates and Map", "time_published": "2026-04-20T00:00:00Z" } ] }, "q4": { "question": "When is the cheapest time to fly from Cancún to St. Louis?", "answer": "The cheapest months to fly from Cancún to St. Louis are May, September, and April, with average fares around $571, $591, and $606 respectively. The most expensive months are March, December, and July, averaging $711, $690, and $672.", "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. For this route, fares for the requested travel direction were unavailable, so the pattern shown is derived from the reverse direction, which shares the same seasonal demand cycle.", "toolsUsed": [ "seasonal_prices" ] }, "q5": { "question": "How far in advance should I book tickets from Cancún to St. Louis?", "answer": "For flights from Cancún to St. Louis, the optimal booking window is 4 to 6 weeks before departure, with average fares around $575. Booking about 25 days out can yield the lowest fare of $569, while last-minute bookings spike to $763. For summer or holiday travel, it's wise to book even earlier, as peak demand can push the best window to 8–12 weeks ahead.", "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. For this route, fares for the requested travel direction were unavailable, so the pattern shown is derived from the reverse direction, which shares the same seasonal demand cycle.", "toolsUsed": [ "booking_timing" ] }, "q6": { "question": "Are overnight (red‑eye) flights available from Cancún to St. Louis?", "answer": "No overnight (red-eye) flights operate from Cancún to St. Louis — there are no nonstop red-eyes on this route, and no connecting itineraries with a red-eye long leg were found.", "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 Cancún to St. Louis?", "answer": "Southwest, Frontier, and American Airlines all fly nonstop from Cancún to St. Louis. Southwest operates up to 37 weekly flights, Frontier offers 14, and American runs 2 flights on Saturdays.", "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 Cancún and St. Louis?", "answer": "Common layovers include Atlanta, Dallas-Fort Worth, Houston, and Miami, which offer broad connections and efficient transfers while keeping total travel time competitive." }, "q9": { "question": "How reliable are on‑time departures on this route from Cancún to St. Louis?", "answer": "On-time performance is generally good, though afternoon thunderstorms in Cancún can cause delays. Morning flights tend to depart more reliably, and Southwest Airlines often posts solid punctuality on this route." }, "q10": { "question": "Which months have the best weather for traveling to St. Louis?", "answer": "April to May and September to October offer pleasant temperatures and fewer tourists than summer." }, "q11": { "question": "What documents should I bring with me to the airport when flying from Cancún to St. Louis?", "answer": "Bring a passport valid for at least six months beyond your stay, a valid U.S. visa or ESTA authorization if required, proof of onward or return travel, a payment method for baggage, and any necessary vaccination certificates." }, "q12": { "question": "Which airport should I use in St. Louis?", "answer": "St. Louis Lambert International Airport is the only commercial airport serving the city. It is located about 14 miles northwest of downtown and is a focus city for Southwest Airlines." }, "q15": { "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Lambert Intl Airport?", "answer": "Lambert International Airport offers free Wi‑Fi throughout both terminals. The airport has nursing rooms and a multi‑faith meditation room in Terminal 1 near gate C, but no designated prayer chapel in Terminal 2. Currency exchange is not available at STL; travelers should exchange money before arriving or use ATMs in the baggage claim and gate areas.", "toolsUsed": [], "references": [ { "url": "https://airport.guide/kstl", "title": "St Louis Airport (STL) | Terminal maps | Airport guide", "favicon": "https://airport.guide/apple-touch-icon.png" }, { "url": "https://en.wikipedia.org/wiki/St._Louis_Lambert_International_Airport", "title": "St. Louis Lambert International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-15T19:57:22Z" }, { "url": "https://www.airport.guide/kstl", "title": "St Louis Airport (STL) | Terminal maps | Airport guide", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/St.%20Louis%20Lambert%20International%20Airport", "title": "St. Louis Lambert International Airport", "time_published": "2026-05-01T13:15:49Z" }, { "url": "https://en.wikipedia.org/wiki/Lambert%20Airport%20Terminal%202%20station", "title": "Lambert Airport Terminal 2 station", "time_published": "2025-12-17T17:36:46Z" } ] }, "q16": { "question": "Are there accessible services or children's facilities at the Cancún and St. Louis airports?", "answer": "Cancún International Airport offers disabled access in its lounges and provides a range of passenger services, with mobility assistance typically arranged in advance through your airline or the airport's official contact (contactos@asur.com.mx or +52 998 848 7200), ideally at least 48 hours before travel. St. Louis Lambert International Airport prioritizes accessibility with wheelchair assistance, visual and audio aids, and trained staff, and features designated children's play areas and nursing rooms in both terminals. Assistance at STL can be requested through your airline or the airport's information desk, and advance notice of 48 hours is recommended to ensure availability.", "toolsUsed": [], "references": [ { "url": "https://www.airport-cun.com/lounges.php", "title": "Lounge Cancun Airport (CUN)", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://www.airport-cun.com/?day=yesterday", "title": "Cancun Airport (CUN)", "time_published": "2024-01-01T00:00:00Z" }, { "url": "https://airportcun.com", "title": "Cancun Airport Official Information | CUN | Arrivals, Departures and Transfers", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://airportcun.com/vip-lounge", "title": "VIP Lounge Información- Aeropuerto Internacional de Cancún", "time_published": "2025-01-01T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/Canc%C3%BAn_International_Airport", "title": "Cancún International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-15T22:11:41Z" }, { "url": "https://airport.guide/kstl", "title": "St Louis Airport (STL) | Terminal maps | Airport guide", "favicon": "https://airport.guide/apple-touch-icon.png" }, { "url": "https://www.airport.guide/kstl", "title": "St Louis Airport (STL) | Terminal maps | Airport guide", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/St._Louis_Lambert_International_Airport", "title": "St. Louis Lambert International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-15T19:57:22Z" }, { "url": "https://en.wikipedia.org/wiki/St.%20Louis%20Lambert%20International%20Airport", "title": "St. Louis Lambert International Airport", "time_published": "2026-05-01T13:15:49Z" }, { "url": "https://en.wikipedia.org/wiki/Lambert%20Airport%20Terminal%202%20station", "title": "Lambert Airport Terminal 2 station", "time_published": "2025-12-17T17:36:46Z" } ] }, "q17": { "question": "What aircraft are typically used on flights from Cancún to St. Louis?", "answer": "Frontier flies nonstop from Cancún to St. Louis, though the specific aircraft type isn't publicly listed for that service. One-stop connecting itineraries most commonly use Boeing 737-900 and 737 MAX 9 aircraft on the longer leg, typically via Houston (IAH) on United, with regional jets like the Embraer 175 or CRJ-550 on the shorter hop into St. Louis. Other frequent connecting options include Boeing 737-800s and Airbus A321s through Dallas, Chicago, or Miami on American, and 737 variants via Houston Hobby or Baltimore on Southwest; the exact aircraft can vary by day and airline.", "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 Cancún to St. Louis?", "answer": "Southwest (WN) and Frontier (F9) both operate nonstop from Cancún to St. Louis and are unaffiliated with any global alliance, while American (AA) also flies the route nonstop and belongs to the oneworld alliance. Other alliances may serve this route via connections, but no SkyTeam or Star Alliance carrier flies it nonstop.", "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 Cancún?", "answer": "Cancún International Airport (CUN) has several independent lounges across Terminals 2, 3, and 4, including Mera Business Lounge (in all three terminals), The Lounge (Terminals 2, 3, and a partnership with Air Transat in Terminal 4), and a VIP Lounge by MERA Roof in Terminal 3. These lounges are generally accessible via Priority Pass, lounge membership programs, or by paying at the door; the Mera lounges typically offer complimentary snacks, drinks, Wi-Fi, and shower facilities. No airline-branded lounges like a Delta Sky Club or American Admirals Club are present at CUN, so premium cabin and elite passengers usually receive invitations to these independent lounges. For example, The Lounge in Terminal 3 is a popular choice for its open-air terrace and runway views.", "toolsUsed": [], "references": [ { "url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/CUN", "title": "American Express Lounges at Cancun International Airport | Amex US", "time_published": "2026-05-05T00:00:00Z" }, { "url": "https://www.prioritypass.com/airport-guides/cancun-international", "title": "Cancun International CUN lounges - CUN Airport Guide and lounges. | Priority Pass", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://www.prioritypass.com/en-GB/airport-guides/cancun-international", "title": "Cancún Airport Guide | Priority Pass", "favicon": "https://www.prioritypass.com/icon.png?a4ff481221414a5c", "time_published": "2024-11-05T16:20:09Z" }, { "url": "https://airportcun.com", "title": "Cancun Airport Official Information | CUN | Arrivals, Departures and Transfers", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://americanexpress.com/es-mx/travel/lounges/the-platinum-card/CUN", "title": "Salas de American Express en Aeropuerto Internacional de Cancún | Amex MX", "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png" } ] }, "q21": { "question": "What is the baggage allowance on this route from Cancún to St. Louis?", "answer": "Cancún to St. Louis baggage policies vary by airline and fare type. Basic economy fares are restrictive and may not include a checked bag, while standard economy often includes one free checked bag and a carry‑on. Premium cabins typically offer more generous allowances." }, "q22": { "question": "What cabin and seat options are typical from Cancún to St. Louis?", "answer": "Flights from Cancún to St. Louis typically offer Economy and First class with recliner seats. Flat-bed Business and Premium Economy are not common on this route." }, "q23": { "question": "Are same‑day changes or standby possible on this route?", "answer": "Policies vary by airline and fare; flexible tickets and premium cabins often allow same‑day changes or standby, while Basic Economy typically does not." } } } }