--- title: "St. Louis to Key West (STL-EYW) flights from - Expedia.ca" description: "Find affordable flights from St. Louis (STL) to Key West (EYW) with one-way fares from and roundtrip from —track the price of your flight today!" canonical: "https://www.expedia.ca/lp/flights/stl/eyw/st-louis-to-key-west" language: en-CA market: CA currency: CAD prices_as_of: 2026-11-15T18:43:26Z --- # Cheap Flights from St. Louis (STL) to Key West (EYW) ![A coastal fortification with a clear blue sea and shallow coral reefs.](https://images.trvl-media.com/place/5724485/c481f545-b2c5-48d9-9e68-48721d96e1f9.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ## Popular airlines from Lambert-St. Louis International Airport (STL) to Key West Intl. Airport (EYW) [American Airlines](https://www.expedia.ca/Flights-Search?leg1=from:STL,to:EYW,departure:29/11/2026TANYT&leg2=from:EYW,to:STL,departure:06/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) [Delta](https://www.expedia.ca/Flights-Search?leg1=from:STL,to:EYW,departure:29/11/2026TANYT&leg2=from:EYW,to:STL,departure:06/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) [United](https://www.expedia.ca/Flights-Search?leg1=from:STL,to:EYW,departure:29/11/2026TANYT&leg2=from:EYW,to:STL,departure:06/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) ### Be in the know Get alerts if flight prices drop or rise\* ### Book smarter Save up to 30% on select hotels after you book a flight\* ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Alternative airports near Key West Prices were available within the past 7 days. Prices and availability are subject to change. [Select flight to Florida Keys Marathon MTH. Average driving time to city centre is 1 hour 15 minutes.](https://www.expedia.ca/Flights-Search?leg1=from:STL,to:MTH,departure:29/11/2026TANYT&trip=oneway&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) 1 h 15 min · Search flights ## Find the cheapest month to fly from St. Louis (STL) to Key West (EYW) ### August is typically the cheapest month to fly From CA $486 - CA $931 per traveller. View flights in August Insights are based on prices from searches for economy trips of 10 days or less on our sites in the last 12 months. Insights are informative only and current prices may differ. ## Book with confidence ### St. Louis to Key West Flights #### The easy way to book your flights from St. Louis to Key West With Expedia, it’s simple to find and book flights to Key West from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Key West Intl., too. Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Key West today, tomorrow, or this week. #### Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Key West Intl., EYW Sort your search results by price to find great deals on your flight from St. Louis to Key West—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Key West from St. Louis currently is just rising to . Here are more money-saving tips: - Fly in when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to Key West - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! #### Reasons to choose Expedia for your flight to Key West from St. Louis Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Key West with Expedia today. ## Frequently Asked Questions ### How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) cost? You can find one-way and return flights from STL to EYW with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when STL to EYW ticket fares go up or down. ### What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? The cheapest months to fly from STL to EYW are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route. ### Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? Enter STL to EYW and your travel dates, then apply the 'Nonstop' filter to see only direct flights. ### What is the cheapest airline that flies from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? American Airlines is one of the cheapest airlines offering connecting flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.), with return tickets starting from around CA$307 for flights that can be booked for departure within the next year, typically with a layover in O'Hare Intl. (ORD). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget. ### How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up [Price Tracking](https://www.expedia.ca/why/price-tracking) and receive alerts when fares go up or down. ### What is the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience. ### How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? There are approximately 28 connecting flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.). Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Charlotte-Douglas Intl. (CLT). ### What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? The earliest flight from St. Louis Lambert International Airport (STL) to Key West International Airport (EYW) typically departs around 5:00 AM. This flight is operated by American Airlines. This is a seasonal service, active in November. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search. ### What day of the week has the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? You'll typically find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) on a Thursday, with around 21 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include American Airlines, United, and Delta. Looking at the week, Thursday has notably more flight options compared to other days, offering you more flexibility. ### What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? The most popular departure times for flights from Lambert-St. Louis Intl. (STL) to Key West Intl. (EYW) are in the early morning, from 6am to 9am. Many major carriers, including American Airlines, United and Delta, offer flights during this window. Many travellers prefer these times because it allows for an early start to their trip, getting them to their destination with plenty of time to enjoy the day. ### How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? There are no nonstop flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.). The distance between these two airports is approximately 1,773 kilometres. If you're looking for the quickest way to get there, one-stop flights typically take around 7 hours. Flights with two or more stops will take longer, usually around 10 hours 18 minutes. Keep in mind that actual travel times can vary based on your specific routing, layover durations, and even weather conditions. ### Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? Yes, you can fly business class or first class between STL and EYW. You can fly business class with Delta. First class cabins are available on Delta, United, and American Airlines. ### How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) flight with Expedia? It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of [One Key™](https://www.expedia.ca/welcome-one-key), you can also earn OneKeyCash™\* on top of your airline miles when you book with Expedia. \*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands. ### What airports do you fly into for Key West, FL (EYW) from St. Louis, MO (STL)? If you're planning to travel to Key West from Lambert-St. Louis Intl. (STL), you can fly directly into Key West Intl. (EYW). Some flights may connect through major hubs like O'Hare Intl. (ORD), Dallas-Fort Worth Intl. (DFW), or LaGuardia (LGA) before reaching Key West. Compare routes and airports on Expedia to find the best flight options for your travel plans. ### Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) at the last minute? Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare. ### Is it cheaper to book a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) flight and hotel package? Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) [flight and hotel package](https://www.expedia.ca/key-west.d1187.destination-travel-guides) is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars. ### Can I cancel or change the date of my flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.)? If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Key West, FL (EYW-Key West Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in [your itinerary](https://www.expedia.ca/trips) or confirmation email. Or, head to our [Customer Service portal](https://www.expedia.ca/helpcenter/) if you'd like more information. ## Travel information | Origin airport | Lambert-St. Louis International Airport | | ------------------- | --------------------------------------- | | Destination airport | Key West Intl. 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Campbell Airport (YYG) to Key West (EYW)](https://www.expedia.ca/lp/flights/yyg/eyw/charlottetown-to-key-west) - [Flights from Melbourne (MLB) to Key West (EYW)](https://www.expedia.ca/lp/flights/mlb/eyw/melbourne-to-key-west) - [Flights from Detroit (DTT) to Key West (EYW)](https://www.expedia.ca/lp/flights/dtt/eyw/detroit-to-key-west) - [Flights from Bartow (BOW) to Key West (EYW)](https://www.expedia.ca/lp/flights/bow/eyw/bartow-to-key-west) - [Flights from Québec (YQB) to Key West (EYW)](https://www.expedia.ca/lp/flights/yqb/eyw/quebec-to-key-west) - [Flights from Boca Raton (BCT) to Key West (EYW)](https://www.expedia.ca/lp/flights/bct/eyw/boca-raton-to-key-west) - [Flights from Cincinnati (CVG) to Key West (EYW)](https://www.expedia.ca/lp/flights/cvg/eyw/cincinnati-to-key-west) - [Flights from Naples (NAP) to Key West (EYW)](https://www.expedia.ca/lp/flights/nap/eyw/naples-to-key-west) - [Flights from St. Petersburg (PIE) to Key West (EYW)](https://www.expedia.ca/lp/flights/pie/eyw/st-petersburg-to-key-west) - [Flights from Charleston (CHS) to Key West (EYW)](https://www.expedia.ca/lp/flights/chs/eyw/charleston-to-key-west) - [Flights from Kansas City (MCI) to Key West (EYW)](https://www.expedia.ca/lp/flights/mci/eyw/kansas-city-to-key-west) - [Flights from Miami (MIA) to Key West (EYW)](https://www.expedia.ca/lp/flights/mia/eyw/miami-to-key-west) - [Flights from Toronto (YTO) to Key West (EYW)](https://www.expedia.ca/lp/flights/yto/eyw/toronto-to-key-west) - [Flights from Syracuse (SYR) to Key West (EYW)](https://www.expedia.ca/lp/flights/syr/eyw/syracuse-to-key-west) - [Flights from Seattle (SEA) to Key West (EYW)](https://www.expedia.ca/lp/flights/sea/eyw/seattle-to-key-west) - [Flights from Waterloo (ALO) to Key West (EYW)](https://www.expedia.ca/lp/flights/alo/eyw/waterloo-to-key-west) - [Flights from Bangor (BGR) to Key West (EYW)](https://www.expedia.ca/lp/flights/bgr/eyw/bangor-to-key-west) - [Flights from Orlando (MCO) to Key West (EYW)](https://www.expedia.ca/lp/flights/mco/eyw/orlando-to-key-west) - [Flights from Newark Liberty Intl. Airport (EWR) to Key West (EYW)](https://www.expedia.ca/lp/flights/ewr/eyw/newark-liberty-intl-airport-to-key-west) - [Flights from Richmond (RIC) to Key West (EYW)](https://www.expedia.ca/lp/flights/ric/eyw/richmond-to-key-west) - [Flights from Orlando (SFB) to Key West (EYW)](https://www.expedia.ca/lp/flights/sfb/eyw/orlando-to-key-west) - [Flights from Marco Island (MRK) to Key West (EYW)](https://www.expedia.ca/lp/flights/mrk/eyw/marco-island-to-key-west) - [Flights from Sarasota (SRQ) to Key West (EYW)](https://www.expedia.ca/lp/flights/srq/eyw/sarasota-to-key-west) - [Flights from Las Vegas (LAS) to Key West (EYW)](https://www.expedia.ca/lp/flights/las/eyw/las-vegas-to-key-west) - [Flights from Panama City (ECP) to Key West (EYW)](https://www.expedia.ca/lp/flights/ecp/eyw/panama-city-to-key-west) - [Flights from West Palm Beach (PBI) to Key West (EYW)](https://www.expedia.ca/lp/flights/pbi/eyw/west-palm-beach-to-key-west) \*Available to Expedia members. ## Other language versions ```yaml hreflang: x-default: https://www.expedia.com/lp/flights/stl/eyw/st-louis-to-key-west fr-FR: https://www.expedia.fr/lp/vols/stl/eyw/st-louis-a-key-west en-JP: https://www.expedia.co.jp/en/lp/flights/stl/eyw/st-louis-to-key-west it-IT: https://www.expedia.it/lp/voli/stl/eyw/st-louis-a-key-west en-IN: https://www.expedia.co.in/lp/flights/stl/eyw/st-louis-to-key-west en-US: https://www.expedia.com/lp/flights/stl/eyw/st-louis-to-key-west en-GB: https://www.expedia.co.uk/lp/flights/stl/eyw/st-louis-to-key-west es-ES: https://www.expedia.es/lp/vuelos/stl/eyw/st-louis-a-cayo-hueso ja-JP: https://www.expedia.co.jp/lp/flights/stl/eyw/st-louis-to-key-west ar: https://www.expedia.sa/lp/flights/stl/eyw/st-louis-to-key-west de-AT: https://www.expedia.at/lp/fluge/stl/eyw/st-louis-nach-key-west ko-KR: https://www.expedia.co.kr/lp/flights/stl/eyw/st-louis-to-key-west de-DE: https://www.expedia.de/lp/fluge/stl/eyw/st-louis-nach-key-west es: https://www.expedia.com/es/lp/vuelos/stl/eyw/st-louis-a-key-west en-KR: https://www.expedia.co.kr/en/lp/flights/stl/eyw/st-louis-to-key-west es-MX: https://www.expedia.mx/lp/vuelos/stl/eyw/st-louis-a-key-west en-SG: https://www.expedia.com.sg/lp/flights/stl/eyw/st-louis-to-key-west en-PH: https://www.expedia.com.ph/lp/flights/stl/eyw/st-louis-to-key-west en-AU: https://www.expedia.com.au/lp/flights/stl/eyw/st-louis-to-key-west en-CA: https://www.expedia.ca/lp/flights/stl/eyw/st-louis-to-key-west nl-NL: https://www.expedia.nl/lp/vluchten/stl/eyw/st-louis-naar-key-west ```