Find flights
Deals
When to book
FAQs & Tips
Airlines

Find cheap flights from St. Louis to Florida Keys from $74

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Florida Keys departing on 5/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Tue 5/28
Tue 6/4

Search hundreds of travel sites at once for deals on flights to Florida Keys

In the last 7 days travelers have searched 43,219,010 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Best Florida Keys Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Miami
Miami1 stop$161
Key West
Key West1 stop$465

Good to know

Low season

October

High season

March

Cheapest flight

$74
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from St. Louis to Miami

FAQs - booking Florida Keys flights

  • How does KAYAK find such low prices on flights from St. Louis to Florida Keys?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Florida Keys.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Florida Keys?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Florida Keys from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Florida Keys?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Florida Keys with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Florida Keys?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Florida Keys from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Florida Keys

  • Looking for a cheap flight? 25% of our users found tickets from St. Louis to the following destinations at these prices or less: Miami $197 one-way - $410 round-trip

Top 5 airlines serving from St. Louis to Florida Keys

 
Need help choosing which airline to fly with from St. Louis to Florida Keys? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10932 reviews
7.9comfort
7.4food
8.6crew
8.0entertainment
8.2boarding
Airline reviews

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

4.0 OkayAndrew, Apr 2024RDU - MCO
Read more about Delta reviews

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

They did a fine job. Can't wait to use Delta in the future.

Seat back monitors and outlets were dead and not working.

The experience was good and the flight departed on time and landed early

The flight was delayed but we got to our final destination.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Boarding super slow with people allowed to linger in aisles

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

First time travel in economy and the worst experience I ever had ! Shame on paying 600 dollars to be in a tuna can ! Service was terrible no even water no even class no even matters your flight attendants were lazy and sloppy very bad experience! After all these years traveling in first and once I try this cause I need to go to a destination for an emergency wow shame on you !

Everything was smooth and easy to fly. No complains and a lot of thanks!

There was a group of school age passengers that were very loud and unruly with their chaperones were no where to be found.

flight delays, staff only communicating when pushed, food service lasting a grand total of 7 minutes, stuck in seat from 45mins into flight until landing

I liked everything about the flight. The service was excellent!

Delayed a day due to snow storm. Was upgraded. That kind of made up for significant delays from FLL to COS with no compensation or acknowledgement.

The crew were really great, but the 4 hour delay in small chunks was the worst.

Everything was very good. Boarding and takeoff were on time and organized. Had a good flight

Other than the two hour delay, it was fine. Of course they were very professional and kept us informed throughout the whole delay..

Good. The wife was not working but then it got resolved.

Good boarding. Crew started quick with drinks and food. They came around several times for trash which I really liked. Other than turbulence due to storms in the area, flight was great.

Seats are way too snug for my hip to knee ratio and the recline on the seat in front of me made my experience worst. My legs had no room at all. Not a plane for people 6 ft or over unless you fly first class.

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

American Airlines continues to price it can provide the least comfortable passenger experience in the air. This legacy carrier rivals the budgets for both terrible seats and inadequate amenities. I am a 5’7” woman who is not wider than a coach seat (even on these narrow bodied aircraft). My 3.5 hour flight was terribly uncomfortable because the leg room is inadequate (my knees hit the seat on front of me even when it was not reclined); the seat barely reclines; and the foam padding is worn thin to the extent one can feel the metal supports of the seat. Add to this the fact that the aisle is super narrow, so that the drink cart literally scrapes the arm rest of the aisle seat. It’s basically torture.

It was a good flight. Of course it was full, but it went well.

We sat on the plane for 1 hour because the airline was short handed could not be unloading.

We are gluten free, there were not any available complimentary gluten free options.

Flight delayed 3 times. We were directed to go to a gate across from our gate. The plane wasn't there yet so we had to wait for it to arrive, then deplane everyone and then wait again for the plane to be cleaned. After 45 minuites we were allowed on the plane. The first plane had mechanical issues. The 2nd plane must have had bathroom issues because we did not have any food service whatsoever. No snack or beverage. That made for a long time not to have anything considering that we had just made it to the original gate and we had no time to stop to get food or a drink. Then we didn't want to leave the gate to get food because we wouldn't know how much longer the delay would be. Then the next gate change. Had we been told that the total time would have been aprox 45 min later we would have left to get food and a beverage. We had to wait again for the okay to the pilot to take off so we were on the runway for another 20 min. Overall, we were delayed over 2 hours which felt like 4 hours.

Lots of weather delays that were poorly communicated and managed. I get there are weather delays but they didn’t make it clear what was happening or comfortable on the plane

Me and my husband experienced very bad in American Airlines. We missed our flight going to Doha. The American Airlines was delayed we arrived already 10:27pm. Supposed to be 9:40 pm. So what they did they rebooked our flight and they gave us a hotel. When we arrived at the hotel the front desk said it was fully booked already. Oh my gosh! I said why did you accept the booking if it's fully booked. The guy said that's American Airlines they just book even it's already full. That's 2am already, we have nothing to do so, we decided to go another hotel. We pay the room, food and taxi. Pls give an action on this matter. Refund our expenses and give us more compensation. Not only our room, food, taxi but also our efforts, tiredness looking for a room that can accommodate us.

Horrible. Flight was delayed and very bumpy. I was super unhappy

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

Spirit canceled the flight in March and never notified me!

Pretty good. Would’ve been excellent if we would have left on time and the crew wasn’t late.

Spirit airline tries to screw you at every opportunity. Spirit wanted 65$ for an extra pound in the suitcase Made me open the suitcase at the counter to remove 1 pound. Staff very cold and rude Will never fly spirit again and will recommend same to family and friends

The weight limit per bag was really low - 40 lbs - so we had to pay extra. Then, they said their carry on size was 14x18x8, and we measured our bag very carefully. It was within the limit, yet they said it was too big, so we ended up paying an extra $100 for that too!! So it wasn’t the cheap flight we thought it would be. Then, they moved up our initial flight to depart 3 hours earlier which meant we had to be out on the road by 7 am and then have a 6 hour layover and we got home at 2am. It was a grueling day. I won’t be flying with them again.

Overall it was a good experience. Stewards were very kind and professional. The departure and arrival times were as promised. Plane was clean.

Terrible as usual!!!! Very unprofessional and rude flight attendants! You get what you pay for! HORRIBLE

My experience was above excellent!!!! First the lady that pushed me in the wheelchair to the gate was outstanding!!! Then the ladies at the gate went over and beyond, by helping me fill out the immigration form! I would not have been able to get to Guatemala without their help!!! God bless them all! They were amazing 🙏❤️🙏

First....my trip was from Ft. Myers to Philly (not the other way around). Plane was clean, staff was friendly and flight was efficient with boarding and flight time. Thumbs up all around.

Early departure and arrival. Cabin very cold. Waited a while for luggage to come out

The no frills ticket price. The seats are very uncomfortable.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight delayed 3 times, resulting in late arrival, rental car place gave car away resulting in increased BS charges because I was late. Frontier blows.

It was impossible to change a carry-on for a checked bag after the initial selection. The flight was delayed 14 hours "to allow for a late arriving aircraft." The seats were shockingly uncomfortable. This was only the second time I've seen seats that didn't recline in an airline. The first was in an East Bloc airline before the fall if the Iron Curtain.

First time flying Frontier, I am not sure the Ala Carte menu of options is for me.

I liked getting off the plane. Everything else was well below standards. Not even offering a bag of peanuts for free for a 4 hours flight is ridiculous.

There was no wifi, there was no usb charger on the planes Frontier lowered the weight limit on suitcases from 50 to 40 pounds Frontier now charges for a seat...really? If i don't pay for a basic seat, do i stand the whole flight? Frontier now charges for the carry on, just like for the checked suitcase The bundle pricing is way over priced.

Bought seats on the flight and they were supposed to be 2 and a jumpseat. Plane clearly changed and it was a regular 3 seat row. Asked for a refund and was denied. If I wanted to sit next to someone else I wouldn't have bought the seats..

Flying frontier reminded me of flying with my family in the 80’s in all of the worst ways possible. From poor customer service to little to no technology. The plane was dirty old and also stuck in the 80’s. From their seatbelts to not having anywhere to charge our phones the seats and the equipment I wasn’t sure if I was being punked or thrown back in time. Needless to say I don’t see myself flying frontier ever again.

I have come to accept Frontier as an absolute no-frills airline, paying for everything I want. A 4.5-hour flight should provide me with a complimentary beverage—rather, $4.9x for a soda. Or a bottle of water ought to be extended at no cost. 4 beers are on the menu, but only 1 type of beer is available (at $9.95). Also, so many restrictions to using a voucher from Barclay‘s Credit Card. Finally, try to reach a live agent for Frontier- impossible!

Everything was on time and smoothly run. All employees appeared happy and enjoying their job. The delay in take-off was unrelated to anything in Frontier’s control. I wish there were a caffeine-fee, sugar free soda drink option besides water. There are multiple zero sugar caffeine free options.

Book cheap flights from St. Louis to Florida Keys

Recent round-trip flight deals

5/18Sat
1 stopFrontier
8h 56mSTL-MIA
5/21Tue
1 stopFrontier
26h 56mMIA-STL
$161
5/11Sat
3 stopsSpirit Airlines
13h 13mSTL-MIA
5/14Tue
2 stopsSpirit Airlines
23h 14mMIA-STL
$177
5/18Sat
2 stops
12h 37mSTL-MIA
5/21Tue
2 stops
25h 35mMIA-STL
$199
5/18Sat
2 stops
12h 37mSTL-MIA
5/21Tue
3 stops
23h 14mMIA-STL
$209
6/15Sat
1 stopDelta
6h 34mSTL-MIA
6/19Wed
1 stopDelta
7h 01mMIA-STL
$238
10/16Wed
nonstopAmerican Airlines
2h 49mSTL-MIA
10/30Wed
nonstopAmerican Airlines
3h 11mMIA-STL
$253
6/23Sun
1 stopDelta
6h 31mSTL-MIA
6/28Fri
1 stopDelta
4h 10mMIA-STL
$258
8/29Thu
nonstopAmerican Airlines
2h 49mSTL-MIA
9/14Sat
nonstopAmerican Airlines
3h 00mMIA-STL
$269
9/7Sat
2 stopsUnited Airlines
25h 18mSTL-MIA
9/14Sat
1 stopUnited Airlines
6h 06mMIA-STL
$426
5/8Wed
1 stopUnited Airlines
9h 54mSTL-EYW
5/14Tue
2 stopsUnited Airlines
11h 15mEYW-STL
$507

Search by stops

Search by airline

Search by price

Recent one-way flight deals

5/14Tue
2 stopsSpirit Airlines
19h 57mSTL-MIA
$74
5/25Sat
1 stopFrontier
8h 56mSTL-MIA
$80
5/15Wed
2 stops
11h 13mSTL-MIA
$95
5/7Tue
2 stops
12h 15mSTL-MIA
$96
8/17Sat
nonstopAmerican Airlines
2h 49mSTL-MIA
$125
5/28Tue
nonstopAmerican Airlines
2h 46mSTL-MIA
$127
7/26Fri
1 stopDelta
6h 34mSTL-MIA
$129
8/17Sat
1 stopDelta
4h 44mSTL-MIA
$134
8/17Sat
2 stopsUnited Airlines
13h 38mSTL-MIA
$223
5/25Sat
2 stopsUnited Airlines
17h 18mSTL-MIA
$283

Search by stops

Search by airline

Search by price

Last minute flights from St. Louis to Florida Keys

Last minute flight, train and bus deals

4/29Mon
multi-stopFrontier
8h 59mSTL-MIA
5/1Wed
multi-stopFrontier
13h 24mMIA-STL
$258
4/29Mon
multi-stopFrontier
8h 59mSTL-MIA
5/4Sat
multi-stopFrontier
17h 15mMIA-STL
$288
5/3Fri
multi-stopSpirit Airlines
26h 22mSTL-MIA
5/7Tue
multi-stopSpirit Airlines
14h 53mMIA-STL
$428
5/3Fri
nonstopAmerican Airlines
2h 47mSTL-MIA
5/12Sun
nonstopAmerican Airlines
2h 53mMIA-STL
$529
5/3Fri
multi-stopAmerican Airlines
6h 05mSTL-MIA
5/12Sun
nonstopAmerican Airlines
3h 03mMIA-STL
$537
5/3Fri
multi-stopSpirit Airlines
26h 22mSTL-MIA
5/5Sun
multi-stopSpirit Airlines
22h 06mMIA-STL
$606
5/2Thu
multi-stopDelta
6h 42mSTL-MIA
5/9Thu
multi-stopDelta
7h 22mMIA-STL
$634
5/3Fri
multi-stopUnited Airlines
5h 53mSTL-MIA
5/10Fri
multi-stopUnited Airlines
22h 48mMIA-STL
$714
4/29Mon
multi-stopUnited Airlines
7h 03mSTL-MIA
5/4Sat
multi-stopUnited Airlines
18h 51mMIA-STL
$735
5/3Fri
multi-stopDelta
6h 40mSTL-MIA
5/6Mon
multi-stopDelta
10h 12mMIA-STL
$875

Search by stops

Search by airline

Search by price

St. Louis - Florida Keys Flights

Departure:

St. Louis (STL)United States

Cabin classes:

$294
$231
$480
$59