STL - EYW

$202 Find Cheap Flights from St. Louis to Key West

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 Key West departing on 7/14. 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
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Key West

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Key West, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Key West, as well as popular online travel agencies
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Flights Deals

Cheap Flights from St. Louis to Key West (STL-EYW)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Key West that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Key West

Sat, Aug 23 - Sat, Aug 30
American Airlines Logo
7:32 am - 4:19 pmSTL-EYW
7h 47m1 stop
American Airlines Logo
7:40 pm - 11:59 pmEYW-STL
5h 19m1 stop
$223American Airlines
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Sat, Aug 23 - Sat, Aug 30
American Airlines Logo
7:19 am - 3:19 pmSTL-EYW
7h 00m1 stop
American Airlines Logo
12:50 pm - 8:50 pmEYW-STL
9h 00m2 stops
$228American Airlines
Find Deal
Sat, Aug 23 - Sat, Aug 30
American Airlines Logo
6:00 am - 5:23 pmSTL-EYW
10h 23m2 stops
American Airlines Logo
12:50 pm - 8:50 pmEYW-STL
9h 00m2 stops
$233American Airlines
Find Deal
Sat, Jul 26 - Wed, Jul 30
Delta Logo
1:23 pm - 7:49 pmSTL-EYW
5h 26m1 stop
Delta Logo
7:00 am - 12:34 pmEYW-STL
6h 34m1 stop
$257Delta
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Sat, Jul 26 - Wed, Jul 30
American Airlines Logo
6:00 am - 3:26 pmSTL-EYW
8h 26m2 stops
American Airlines Logo
4:48 pm - 11:59 pmEYW-STL
8h 11m1 stop
$271American Airlines
Find Deal
Thu, Sep 4 - Sun, Sep 7
United Airlines Logo
8:20 am - 12:15 pmSTL-EYW
26h 55m2 stops
United Airlines Logo
6:45 pm - 6:58 pmEYW-STL
25h 13m2 stops
$354United Airlines
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Thu, Jul 24 - Wed, Jul 30
 Logo
10:47 am - 4:36 pmSTL-EYW
28h 49m3 stops
 Logo
10:02 am - 9:52 amEYW-STL
24h 50m2 stops
Thu, Jul 10 - Tue, Jul 15
 Logo
10:47 am - 9:22 amSTL-EYW
21h 35m2 stops
 Logo
10:02 am - 10:29 amEYW-STL
25h 27m3 stops
Wed, Sep 24 - Sun, Sep 28
United Airlines Logo
6:35 am - 6:05 pmSTL-EYW
10h 30m2 stops
United Airlines Logo
6:45 pm - 2:27 pmEYW-STL
20h 42m2 stops
$458United Airlines
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Thu, Jul 24 - Sun, Jul 27
Delta Logo
6:00 am - 1:08 pmSTL-EYW
6h 08m1 stop
Delta Logo
6:27 pm - 11:53 pmEYW-STL
6h 26m1 stop
$529Delta
Find Deal
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KAYAK's insights & trends for St. Louis to Key West flights

Get data-powered insights and trends into flights from St. Louis to Key West to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to Key West?

The average price of all round-trip flights from St. Louis to Key West clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from St. Louis to Key West, look for departures on Fridays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Key West, Thursday is the cheapest day to fly and Tuesday is the most expensive.

What is the cheapest month to fly from St. Louis to Key West?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Key West, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Key West is September, where tickets cost $358 (return) on average. On the other hand, the most expensive months are March and June, where the average cost of round-trip tickets is $564 and $492 respectively.

How far in advance should I book a flight from St. Louis to Key West?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Key West, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Key West, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonMay
High seasonJanuary
Cheapest flight$202
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from St. Louis to Key West

When to book flights from St. Louis to Key West

Are your dates flexible? Find out the best times to travel from St. Louis to Key West based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Key West

  • What is the cheapest flight from St. Louis to Key West?

    In the last 3 days, the lowest price for a flight from St. Louis to Key West was $202 for a one-way ticket and $223 for a round-trip.

  • Do I need a passport to fly between St. Louis and Key West?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from St. Louis to Key West?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Key West?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between St. Louis and Key West, with SkyTeam being the most commonly used for this route.

  • What is the most popular layover when flying to Key West from St. Louis?

    Charlotte is the most popular layover city among KAYAK users traveling from St. Louis to Key West.

  • Which is the best airline for flights from St. Louis to Key West, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Key West are Delta and United Airlines. With an average price for the route of $453 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $536 and an overall rating of 7.4.

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

    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 Key West.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Key West 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 Key West?

    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 Key West with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and EYW can sometimes prove cheaper using this method.

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

    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 Key West from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top 3 airlines serving from St. Louis to Key West

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Key West. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Key West? 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 7946 reviews
8.5Crew
8.2Boarding
7.9Comfort
7.3Food
7.9Entertainment
Airline reviews

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

10.0 ExcellentHartaj, Jun 2025EWR - RDU
Read more Delta reviews

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

I am very bothered by the events today. I can't believe the flight attendants allowed someone to take my seat and made me move. It was embarrassing. I was in the right. The lady just didn't want move. I can't believe delta would allow this to stand and disrespect my rights as a passenger. The lady complained about her leg and that she couldn't move. Firstly somehow she was able to make it to row 24. Not sure how much her leg could have hurt. Secondly, I'm in plenty of pain myself. I just finished chemotherapy a several weeks ago. My body is constantly sore. Yet deltas flight attendants didn't appropriately protect my rights. In the end they found me a seat on the plane but I want to understand how delta can operate this way. They in essence allowed a bully to get their way.

Crew was friendly Love the entertainment in the seat head rest.

Other then mechanical/ computer problem and 3.5 hours flight delay the flight was great. I guess that what happened when you fly an old airplane now a day.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

I liked that the flight was nonstop from ORD to CIU for $200 round trip.

Smooth flight, especially take off and landing, and great crew on board. Really loved the stroopwaffles!

During service there was a garbage/beverage spill near our seats that never was cleaned up. On a relatively short flight when we’re fortunate enough to actually have in flight movies available, the flight attendants pitching the AADVANTAGE credit card shouldn’t talk for the last 10 minutes of the flight so that we miss the end of the movie.

Waited on the runway for takeoff for 2.5 hours. Air traffic rerouted us. The plane didn't have enough fuel, so had to go back to the gate. Had to wait for a new pilot. Should have landed at 5:22. Didn't land until 9:10. Trash flight.

The boarding was pretty easy. However, the first class seats are not lay flat as other airlines (like JetBlue) has and therefore sleeping was a challenge.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

Would have thought that they would gas up plane before everyone got on board

Fine. On time, cabin service was fine, bag arrived. All good. Flying into DCA so did not collide with any helicopters, which is also good. Horrid incident that could have and should have been prevented.

Standard. No different than a discount carrier on a short trip.

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

The flights were terribly delayed and then cancelled which forced us booking another night at the hotel. Very poor management from American Airlines

Crew was late. Baggage was late. 2hs inside the plane waiting fro de-icing and traffic. A 3:30hs flight ended up being almost 6hs inside the airplane.

Everything you need to know for your flight from St. Louis to Key West

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