$99+ Cheap flights from St. Louis (STL) to Florida Keys
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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EYW
Jul 9 — Jul 161
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Florida Keys 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Florida Keys
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Cheapest flights from St. Louis to Florida KeysExplore the most affordable flight options available from St. Louis to Florida Keys. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2026.
Explore the most affordable flight options available from St. Louis to Florida Keys. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:35 am
STL
- MIA
1 stop21h 48m
Frontier
Sun 11/157:17 pm
MIA
- STL
1 stop15h 23m
Frontier
Deal found 6/5![Frontier logo]()
$234
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/254:57 pm
STL
- MIA
1 stop5h 43m
Frontier
Wed 7/296:00 am
MIA
- STL
1 stop14h 23m
Frontier
Deal found 6/6![Frontier logo]()
$235
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.
Thu 7/26:31 pm
STL
- MIA
1 stop27h 32m
Frontier
Tue 7/75:28 pm
MIA
- STL
1 stop16h 29m
Frontier
Deal found 6/6![Frontier logo]()
$236
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.
Fri 7/244:57 pm
STL
- MIA
1 stop19h 56m
Frontier
Thu 7/3011:19 am
MIA
- STL
1 stop7h 18m
Frontier
Deal found 6/6![Frontier logo]()
$237
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.
Fri 7/104:57 pm
STL
- MIA
1 stop26h 32m
Frontier
Sat 7/185:54 pm
MIA
- STL
1 stop24h 43m
Frontier
Deal found 6/7![Frontier logo]()
$238
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/274:57 pm
STL
- MIA
1 stop5h 08m
Frontier
Tue 7/286:00 am
MIA
- STL
1 stop14h 23m
Frontier
Deal found 6/6![Frontier logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Fri 7/174:57 pm
STL
- MIA
1 stop26h 32m
Frontier
Tue 7/218:30 am
MIA
- STL
1 stop10h 07m
Frontier
Deal found 6/4![Frontier logo]()
$242
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 6/205:06 pm
STL
- MIA
1 stop5h 28m
Frontier
Tue 6/235:26 pm
MIA
- STL
1 stop16h 26m
Frontier
Deal found 6/6![Frontier logo]()
$243
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/42:56 pm
STL
- MIA
1 stop15h 15m
Frontier
Wed 7/86:00 am
MIA
- STL
1 stop14h 23m
Frontier
Deal found 6/7![Frontier logo]()
$244
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/78:08 pm
STL
- MIA
1 stop8h 43m
Frontier
Sat 8/156:50 am
MIA
- STL
1 stop9h 06m
Frontier
Deal found 6/7![Frontier logo]()
$245
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:08 pm
STL
- MIA
1 stop8h 46m
Frontier
Sat 7/47:00 am
MIA
- STL
1 stop12h 34m
Frontier
Deal found 6/9![Frontier logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 6/245:06 pm
STL
- MIA
2 stops25h 21m
Frontier
Tue 6/3011:19 am
MIA
- STL
1 stop7h 11m
Frontier
Deal found 6/4![Frontier logo]()
$247
Best flights from St. Louis to Florida KeysDiscover carefully curated flight deals from St. Louis to Florida Keys that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 9, 2026.
Discover carefully curated flight deals from St. Louis to Florida Keys that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 9, 2026.
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:25 am
STL
- MIA
1 stop7h 05m
Southwest
Sat 9/126:30 am
MIA
- STL
2 stops7h 55m
Southwest
Deal found 6/8![Southwest logo]()
$258
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 6/6. 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
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/177:07 am
STL
- EYW
1 stop8h 47m
American Airlines
Sat 7/185:34 pm
EYW
- STL
1 stop6h 58m
American Airlines
Deal found 6/8![American Airlines logo]()
$438
This United Airlines 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 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 6/6![United Airlines logo]()
$503
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:30 pm
STL
- MIA
Nonstop2h 40m
Southwest
Mon 8/175:45 am
MIA
- STL
1 stop8h 20m
Southwest
Deal found 6/7![Southwest logo]()
$265
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 Southwest deal was found by Cheapflights users on 6/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/135:50 am
STL
- MIA
1 stop7h 30m
Southwest
Thu 7/165:25 am
MIA
- STL
2 stops7h 45m
Southwest
Deal found 6/4![Southwest logo]()
$280
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/273:15 pm
STL
- MIA
2 stops5h 50m
Southwest
Mon 9/76:20 am
MIA
- STL
1 stop6h 15m
Southwest
Deal found 6/8![Southwest logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 stop18h 16m
Multiple Airlines
Mon 7/2011:57 am
EYW
- STL
2 stops30h 40m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$361
This Southwest deal was found by Cheapflights users on 6/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:30 am
STL
- MIA
2 stops9h 45m
Southwest
Tue 9/17:10 am
MIA
- STL
2 stops8h 40m
Southwest
Deal found 6/4![Southwest logo]()
$281
This Southwest deal was found by Cheapflights users on 6/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/82:20 pm
STL
- MIA
2 stops7h 35m
Southwest
Wed 7/1511:25 am
MIA
- STL
2 stops8h 50m
Southwest
Deal found 6/4![Southwest logo]()
$285
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.
Wed 6/241:39 pm
STL
- EYW
1 stop5h 14m
Delta
Wed 7/17:50 am
EYW
- STL
1 stop5h 44m
Delta
Deal found 6/6![Delta logo]()
$393
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/39:55 am
STL
- MIA
1 stop5h 30m
Southwest
Tue 7/77:40 am
MIA
- STL
Nonstop2h 50m
Southwest
Deal found 6/6![Southwest logo]()
$316
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 7/239:24 am
STL
- EYW
1 stop6h 59m
Delta
Tue 7/286:18 pm
EYW
- STL
1 stop6h 35m
Delta
Deal found 6/9![Delta logo]()
$426
This American Airlines deal was found by Cheapflights users on 6/4. 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.
Fri 8/146:00 am
STL
- EYW
2 stops9h 18m
American Airlines
Mon 8/174:50 pm
EYW
- STL
1 stop6h 50m
American Airlines
Deal found 6/4![American Airlines logo]()
$522
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/302:30 pm
STL
- MIA
1 stop7h 10m
Southwest
Fri 7/317:15 am
MIA
- STL
Nonstop2h 50m
Southwest
Deal found 6/6![Southwest logo]()
$316
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.
Mon 9/76:00 am
STL
- EYW
1 stop6h 00m
Delta
Sun 9/137:00 am
EYW
- STL
1 stop6h 53m
Delta
Deal found 6/6![Delta logo]()
$459
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/112:45 pm
STL
- MIA
Nonstop2h 40m
Southwest
Tue 7/74:00 pm
MIA
- STL
1 stop7h 30m
Southwest
Deal found 6/6![Southwest logo]()
$316
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 6/169:21 am
STL
- EYW
1 stop7h 06m
Delta
Sun 6/216:23 pm
EYW
- STL
1 stop6h 33m
Delta
Deal found 6/9![Delta logo]()
$462
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/85:15 am
STL
- MIA
1 stop7h 50m
Southwest
Sun 8/165:50 am
MIA
- STL
Nonstop2h 45m
Southwest
Deal found 6/7![Southwest logo]()
$332
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/198:25 am
STL
- MIA
1 stop8h 55m
Southwest
Thu 7/237:15 am
MIA
- STL
Nonstop2h 50m
Southwest
Deal found 6/8![Southwest logo]()
$338
Last-minute flights from St. Louis to Florida KeysDiscover last-minute flight deals from St. Louis to Florida Keys. Data last updated June 9, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Florida Keys. Data last updated June 9, 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 6/205:06 pm
STL
- MIA
1 stop5h 28m
Frontier
Tue 6/235:26 pm
MIA
- STL
1 stop16h 26m
Frontier
Deal found 6/6![Frontier logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 6/245:06 pm
STL
- MIA
2 stops25h 21m
Frontier
Tue 6/3011:19 am
MIA
- STL
1 stop7h 11m
Frontier
Deal found 6/4![Frontier logo]()
$247
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:08 pm
STL
- MIA
1 stop8h 46m
Frontier
Sat 7/47:00 am
MIA
- STL
1 stop12h 34m
Frontier
Deal found 6/9![Frontier logo]()
$246
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.
Thu 7/26:31 pm
STL
- MIA
1 stop27h 32m
Frontier
Tue 7/75:28 pm
MIA
- STL
1 stop16h 29m
Frontier
Deal found 6/6![Frontier logo]()
$236
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/42:56 pm
STL
- MIA
1 stop15h 15m
Frontier
Wed 7/86:00 am
MIA
- STL
1 stop14h 23m
Frontier
Deal found 6/7![Frontier logo]()
$244
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 6/7. 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.
Fri 7/104:57 pm
STL
- MIA
1 stop26h 32m
Frontier
Sat 7/185:54 pm
MIA
- STL
1 stop24h 43m
Frontier
Deal found 6/7![Frontier logo]()
$238
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.
Thu 7/166:34 pm
STL
- MIA
1 stop27h 31m
Frontier
Thu 7/238:32 pm
MIA
- STL
2 stops37h 25m
Frontier
Deal found 6/9![Frontier logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Fri 7/174:57 pm
STL
- MIA
1 stop26h 32m
Frontier
Tue 7/218:30 am
MIA
- STL
1 stop10h 07m
Frontier
Deal found 6/4![Frontier logo]()
$242
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.
Fri 7/244:57 pm
STL
- MIA
1 stop19h 56m
Frontier
Thu 7/3011:19 am
MIA
- STL
1 stop7h 18m
Frontier
Deal found 6/6![Frontier logo]()
$237
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/254:57 pm
STL
- MIA
1 stop5h 43m
Frontier
Wed 7/296:00 am
MIA
- STL
1 stop14h 23m
Frontier
Deal found 6/6![Frontier logo]()
$235
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/274:57 pm
STL
- MIA
1 stop5h 08m
Frontier
Tue 7/286:00 am
MIA
- STL
1 stop14h 23m
Frontier
Deal found 6/6![Frontier logo]()
$240
One-way flights from St. Louis to Florida KeysSearch for one-way flight options from St. Louis to Florida Keys. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
Search for one-way flight options from St. Louis to Florida Keys. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Tue 9/86:33 pm
STL
- MIA
1 stop25h 31m
Frontier
Deal found 6/4![Frontier logo]()
$99
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/14:57 pm
STL
- MIA
1 stop22h 36m
Frontier
Deal found 6/5![Frontier logo]()
$102
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/294:57 pm
STL
- MIA
1 stop29h 08m
Frontier
Deal found 6/5![Frontier logo]()
$104
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.
Tue 6/306:31 pm
STL
- MIA
1 stop18h 18m
Frontier
Deal found 6/6![Frontier logo]()
$108
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.
Tue 9/16:33 pm
STL
- MIA
1 stop20h 58m
Frontier
Deal found 6/7![Frontier logo]()
$110
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/314:57 pm
STL
- MIA
1 stop19h 56m
Frontier
Deal found 6/6![Frontier logo]()
$113
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:35 am
STL
- MIA
Nonstop2h 40m
Southwest
Deal found 6/8![Southwest logo]()
$114
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:08 pm
STL
- MIA
1 stop8h 46m
Frontier
Deal found 6/8![Frontier logo]()
$115
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:34 pm
STL
- MIA
1 stop27h 31m
Frontier
Deal found 6/5![Frontier logo]()
$116
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1712:30 pm
STL
- MIA
Nonstop2h 40m
Southwest
Deal found 6/8![Southwest logo]()
$117
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:35 am
STL
- MIA
Nonstop2h 54m
American Airlines
Deal found 6/9![American Airlines logo]()
$118
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:08 pm
STL
- MIA
1 stop8h 46m
Frontier
Deal found 6/9![Frontier logo]()
$120
Find flight deals from St. Louis to Florida Keys
Keep the following information in mind while searching for St. Louis to Florida Keys flight deals. Data was last updated June 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $234 (Kiwi.com) |
One-way from | $99 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $439 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Florida Keys 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 9, 2026.
Use the filters below to find and compare flights from St. Louis to Florida Keys that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMiami
STL - MIA
STLMIA
Lambert-St Louis
Sat 9/5
8:25 am-4:30 pm
1 stop7h 05m
Miami
Sat 9/12
6:30 am-1:25 pm
2 stops7h 55m
$258
St. LouisMiami
STL - MIA
STLMIA
Lambert-St Louis
Mon 8/10
12:30 pm-4:10 pm
Nonstop2h 40m
Miami
Mon 8/17
5:45 am-1:05 pm
1 stop8h 20m
$265
St. LouisMiami
STL - MIA
STLMIA
Lambert-St Louis
Mon 7/13
5:50 am-2:20 pm
1 stop7h 30m
Miami
Thu 7/16
5:25 am-12:10 pm
2 stops7h 45m
$280
St. LouisMiami
STL - MIA
STLMIA
Lambert-St Louis
Thu 8/27
3:15 pm-10:05 pm
2 stops5h 50m
Miami
Mon 9/7
6:20 am-11:35 am
1 stop6h 15m
$280
St. LouisMiami
STL - MIA
STLMIA
Lambert-St Louis
Sat 8/29
8:30 am-7:15 pm
2 stops9h 45m
Miami
Tue 9/1
7:10 am-2:50 pm
2 stops8h 40m
$281
St. LouisMiami
STL - MIA
STLMIA
Lambert-St Louis
Wed 7/8
2:20 pm-10:55 pm
2 stops7h 35m
Miami
Wed 7/15
11:25 am-7:15 pm
2 stops8h 50m
$285
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
Tue 8/11
7:00 am-1:00 pm
1 stop5h 00m
Key West
Sat 8/22
7:40 am-11:56 am
1 stop5h 16m
$303
Quickest round-trip
St. LouisMiami
STL - MIA
STLMIA
Lambert-St Louis
Fri 7/3
9:55 am-4:25 pm
1 stop5h 30m
Miami
Tue 7/7
7:40 am-9:30 am
Nonstop2h 50m
$316
St. LouisMiami
STL - MIA
STLMIA
Lambert-St Louis
Thu 7/30
2:30 pm-10:40 pm
1 stop7h 10m
Miami
Fri 7/31
7:15 am-9:05 am
Nonstop2h 50m
$316
Showing 1-10 of 38 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Florida Keys
Have a flexible travel schedule? Discover the best time to fly to Florida Keys from St. Louis with our price prediction graph.
STL-MIA
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 Florida Keys
STL-zzEOA
STL-MIA
STL-EYW
What is the cheapest month to book a flight from St. Louis to Florida Keys?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Florida Keys (average of $81). Flying from St. Louis to Florida Keys in March is currently the most expensive (average of $222). 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 far ahead should I book a flight from St. Louis to Florida Keys?
To ensure you get the cheapest price possible for a flight from St. Louis to Florida Keys, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Reviews of airlines servicing Florida Keys
Get insights into the airlines that provide service to Florida Keys. 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 Florida Keys. Reviews last updated June 9, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from St. Louis to Florida Keys have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Florida Keys. 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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Alternative routes for St. Louis to Florida Keys
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Complete your trip
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St. Louis and Florida Keys flights
Browse other St. Louis and Florida Keys flight options. Last updated on June 9, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from St. Louis to Florida Keys
Discover the top 3 airlines that operate flights from St. Louis to Florida Keys. 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 9, 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% |