$148+ Cheap flights from St. Louis to Key West (STL - EYW)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EYW
Jul 11 — Jul 181
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Key West with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Best
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One-way
Cheapest flights from St. Louis to Key WestExplore the most affordable flight options available from St. Louis to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.
Explore the most affordable flight options available from St. Louis to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:22 pm
STL
- EYW
1 stop5h 29m
Delta
Tue 7/146:18 pm
EYW
- STL
1 stop4h 57m
Delta
Deal found 6/7![Delta logo]()
$293
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:00 am
STL
- EYW
1 stop5h 00m
Delta
Sat 8/227:40 am
EYW
- STL
1 stop5h 16m
Delta
Deal found 6/6![Delta logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/284:17 pm
STL
- EYW
1 stop18h 10m
Multiple Airlines
Thu 7/27:53 pm
EYW
- STL
2 stops37h 59m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$306
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/288:00 am
STL
- EYW
1 stop6h 19m
United Airlines
Sat 7/44:00 pm
EYW
- STL
1 stop6h 26m
United Airlines
Deal found 6/7![United Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:09 pm
STL
- EYW
1 stop18h 16m
Multiple Airlines
Fri 8/211:11 pm
EYW
- STL
2 stops20h 41m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/284:17 pm
STL
- EYW
1 stop18h 10m
Multiple Airlines
Wed 7/111:46 am
EYW
- STL
2 stops30h 44m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/94:09 pm
STL
- EYW
1 stop18h 18m
Multiple Airlines
Tue 8/181:14 pm
EYW
- STL
2 stops20h 38m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$325
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:30 pm
STL
- EYW
1 stop5h 13m
Delta
Sat 10/317:00 am
EYW
- STL
1 stop6h 56m
Delta
Deal found 6/8![Delta logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/274:17 pm
STL
- EYW
1 stop18h 08m
Multiple Airlines
Thu 7/27:53 pm
EYW
- STL
2 stops37h 59m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:20 am
STL
- EYW
1 stop6h 59m
United Airlines
Thu 7/164:00 pm
EYW
- STL
1 stop6h 26m
United Airlines
Deal found 6/8![United Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/94:09 pm
STL
- EYW
1 stop18h 18m
Multiple Airlines
Wed 8/1911:46 am
EYW
- STL
2 stops30h 44m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:35 am
STL
- EYW
2 stops23h 46m
Multiple Airlines
Thu 9/1710:59 am
EYW
- STL
1 stop9h 40m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$335
Best flights from St. Louis to Key WestDiscover carefully curated flight deals from St. Louis to Key West that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 11, 2026.
Discover carefully curated flight deals from St. Louis to Key West that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 11, 2026.
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:52 pm
STL
- EYW
1 stop6h 05m
Delta
Sat 8/227:40 am
EYW
- STL
1 stop5h 16m
Delta
Deal found 6/9![Delta logo]()
$293
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/288:00 am
STL
- EYW
1 stop6h 19m
United Airlines
Sat 7/44:00 pm
EYW
- STL
1 stop6h 26m
United Airlines
Deal found 6/7![United Airlines logo]()
$311
This American Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:00 am
STL
- EYW
1 stop7h 17m
American Airlines
Sat 9/264:39 pm
EYW
- STL
1 stop7h 03m
American Airlines
Deal found 6/5![American Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:22 pm
STL
- EYW
1 stop5h 29m
Delta
Tue 7/146:18 pm
EYW
- STL
1 stop4h 57m
Delta
Deal found 6/7![Delta logo]()
$293
This American Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:55 am
STL
- EYW
2 stops9h 26m
American Airlines
Tue 8/44:41 pm
EYW
- STL
2 stops8h 35m
American Airlines
Deal found 6/5![American Airlines logo]()
$488
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:55 am
STL
- EYW
1 stop5h 19m
Delta
Sun 9/137:00 am
EYW
- STL
1 stop6h 53m
Delta
Deal found 6/7![Delta logo]()
$479
This American Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:30 am
STL
- EYW
1 stop4h 53m
American Airlines
Sun 10/115:32 pm
EYW
- STL
1 stop7h 09m
American Airlines
Deal found 6/5![American Airlines logo]()
$498
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:51 am
STL
- EYW
1 stop4h 20m
Delta
Sun 11/17:00 am
EYW
- STL
1 stop6h 56m
Delta
Deal found 6/9![Delta logo]()
$573
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/215:20 pm
STL
- EYW
1 stop18h 42m
United Airlines
Thu 11/262:30 pm
EYW
- STL
2 stops11h 04m
United Airlines
Deal found 6/10![United Airlines logo]()
$713
Last-minute flights from St. Louis to Key WestDiscover last-minute flight deals from St. Louis to Key West. Data last updated June 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Key West. Data last updated June 11, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/274:17 pm
STL
- EYW
1 stop18h 08m
Multiple Airlines
Thu 7/27:53 pm
EYW
- STL
2 stops37h 59m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/274:17 pm
STL
- EYW
1 stop18h 08m
Multiple Airlines
Wed 7/111:46 am
EYW
- STL
2 stops30h 44m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/284:17 pm
STL
- EYW
1 stop18h 10m
Multiple Airlines
Thu 7/27:53 pm
EYW
- STL
2 stops37h 59m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$306
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/288:00 am
STL
- EYW
1 stop6h 19m
United Airlines
Sat 7/44:00 pm
EYW
- STL
1 stop6h 26m
United Airlines
Deal found 6/7![United Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/284:17 pm
STL
- EYW
1 stop18h 10m
Multiple Airlines
Wed 7/111:46 am
EYW
- STL
2 stops30h 44m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:22 pm
STL
- EYW
1 stop5h 29m
Delta
Tue 7/146:18 pm
EYW
- STL
1 stop4h 57m
Delta
Deal found 6/7![Delta logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/84:09 pm
STL
- EYW
1 stop19h 39m
Multiple Airlines
Wed 7/1511:46 am
EYW
- STL
2 stops30h 51m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$342
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:20 am
STL
- EYW
1 stop6h 59m
United Airlines
Thu 7/164:00 pm
EYW
- STL
1 stop6h 26m
United Airlines
Deal found 6/8![United Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/106:00 am
STL
- EYW
1 stop6h 23m
Delta
Wed 7/156:18 pm
EYW
- STL
1 stop6h 35m
Delta
Deal found 6/9![Delta logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/154:09 pm
STL
- EYW
1 stop19h 39m
Multiple Airlines
Mon 7/203:27 pm
EYW
- STL
2 stops42h 30m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/184:09 pm
STL
- EYW
1 stop18h 16m
Multiple Airlines
Tue 7/211:14 pm
EYW
- STL
2 stops20h 43m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$356
One-way flights from St. Louis to Key WestSearch for one-way flight options from St. Louis to Key West. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
Search for one-way flight options from St. Louis to Key West. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:34 pm
STL
- EYW
2 stops15h 53m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/248:08 pm
STL
- EYW
2 stops14h 17m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$284
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:20 am
STL
- EYW
1 stop6h 59m
United Airlines
Deal found 6/9![United Airlines logo]()
$304
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/296:01 am
STL
- EYW
1 stop6h 29m
United Airlines
Deal found 6/8![United Airlines logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:38 pm
STL
- EYW
3 stops38h 28m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$383
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/151:39 pm
STL
- EYW
1 stop5h 14m
Delta
Deal found 6/8![Delta logo]()
$450
Find flight deals from St. Louis to Key West
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Key West (EYW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $293 (Delta) |
One-way from | $148 (Kiwi.com) |
Popular in | October |
Cheapest in | December |
Average price | $470 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Key West that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 11, 2026.
Use the filters below to find and compare flights from St. Louis to Key West that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Tue 8/11
12:52 pm-7:57 pm
1 stop6h 05m
Key West
Sat 8/22
7:40 am-11:56 am
1 stop5h 16m
$293
Quickest round-trip
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Tue 7/7
1:22 pm-7:51 pm
1 stop5h 29m
Key West
Tue 7/14
6:18 pm-10:15 pm
1 stop4h 57m
$293
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Sun 6/28
8:00 am-3:19 pm
1 stop6h 19m
Key West
Sat 7/4
4:00 pm-9:26 pm
1 stop6h 26m
$311
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Tue 9/22
5:00 am-1:17 pm
1 stop7h 17m
Key West
Sat 9/26
4:39 pm-10:42 pm
1 stop7h 03m
$343
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Wed 9/9
10:55 am-5:14 pm
1 stop5h 19m
Key West
Sun 9/13
7:00 am-12:53 pm
1 stop6h 53m
$479
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Sat 8/1
6:55 am-5:21 pm
2 stops9h 26m
Key West
Tue 8/4
4:41 pm-12:16 am
2 stops8h 35m
$488
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Wed 10/7
5:30 am-11:23 am
1 stop4h 53m
Key West
Sun 10/11
5:32 pm-11:41 pm
1 stop7h 09m
$498
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Thu 10/29
11:51 am-5:11 pm
1 stop4h 20m
Key West
Sun 11/1
7:00 am-12:56 pm
1 stop6h 56m
$573
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Sat 11/21
5:20 pm-1:02 pm
1 stop18h 42m
Key West
Thu 11/26
2:30 pm-12:34 am
2 stops11h 04m
$713
Cheapest one-way
St. LouisKey West
STL - EYW
STLEYW
Lambert-St Louis
Sun 8/9
6:34 pm-11:27 am
2 stops15h 53m
$148
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Key West
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Key West in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Key West flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Key West flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Key West flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Key West flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Key West flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Key West
Have a flexible travel schedule? Discover the best time to fly to Key West from St. Louis with our price prediction graph.
STL-EYW
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Key West
How far ahead should I book a flight from St. Louis to Key West?
Booking 33 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Key West. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from St. Louis to Key West?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Key West (average of $283). Flying from St. Louis to Key West in October is currently the most expensive (average of $586). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from St. Louis to Key West?
Reviews of airlines servicing Key West
Get insights into the airlines that provide service to Key West. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Key West. Reviews last updated June 11, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from St. Louis to Key West by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Boarding
8.1
Entertainment
7.8
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Food
7.2
Boarding
8.1
Entertainment
7.8
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Food
7.2
Boarding
8.1
Entertainment
7.8
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Food
7.2
Boarding
8.1
Entertainment
7.8
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Key West. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Other flights to Key West
Explore flights to Key West departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 11, 2026.
St. Louis and Key West flights
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Top 3 airlines flying from St. Louis to Key West
Discover the top 3 airlines that operate flights from St. Louis to Key West. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$222 | Average$403 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$240 | Average$415 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$262 | Average$448 | FlexibilityNo cancel fee | On-time69% |