STL - EYW

$182 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 9/30. 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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Flight 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

Tue, Nov 11 - Tue, Nov 18
American Airlines Logo
5:15 am - 1:03 pmSTL-EYW
6h 48m1 stop
American Airlines Logo
6:33 pm - 11:07 pmEYW-STL
5h 34m1 stop
$223American Airlines
Find Deal
Tue, Nov 11 - Tue, Nov 18
American Airlines Logo
8:13 am - 5:01 pmSTL-EYW
7h 48m2 stops
American Airlines Logo
6:33 pm - 11:07 pmEYW-STL
5h 34m1 stop
$228American Airlines
Find Deal
Wed, Dec 3 - Sat, Dec 6
American Airlines Logo
1:20 pm - 11:07 pmSTL-EYW
8h 47m2 stops
American Airlines Logo
7:00 am - 1:18 pmEYW-STL
7h 18m2 stops
$233American Airlines
Find Deal
Tue, Nov 18 - Mon, Nov 24
American Airlines Logo
8:13 am - 2:55 pmSTL-EYW
5h 42m1 stop
American Airlines Logo
6:33 pm - 11:07 pmEYW-STL
5h 34m1 stop
$241American Airlines
Find Deal
Thu, Oct 23 - Mon, Oct 27
 Logo
1:41 pm - 8:15 amSTL-EYW
17h 34m1 stop
 Logo
11:11 am - 9:07 amEYW-STL
22h 56m2 stops
Sat, Sep 20 - Sat, Sep 27
Delta Logo
10:15 am - 5:15 pmSTL-EYW
6h 00m1 stop
Delta Logo
6:10 pm - 10:00 pmEYW-STL
4h 50m1 stop
$339Delta
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Fri, Oct 17 - Fri, Oct 24
 Logo
11:32 am - 10:07 amSTL-EYW
21h 35m2 stops
 Logo
8:55 am - 5:47 pmEYW-STL
9h 52m1 stop
Fri, Oct 17 - Fri, Oct 24
Delta Logo
1:30 pm - 8:06 pmSTL-EYW
5h 36m1 stop
Delta Logo
6:17 pm - 11:41 pmEYW-STL
6h 24m1 stop
$419Delta
Find Deal
Tue, Nov 4 - Fri, Nov 7
United Airlines Logo
6:43 pm - 3:19 pmSTL-EYW
19h 36m1 stop
United Airlines Logo
4:00 pm - 10:51 amEYW-STL
19h 51m1 stop
$475United Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
United Airlines Logo
5:27 pm - 2:06 pmSTL-EYW
19h 39m3 stops
United Airlines Logo
3:02 pm - 2:23 pmEYW-STL
24h 21m2 stops
$495United Airlines
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $223 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 33% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 17% price drop
January
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$223
Overall average: $397
American Airlines
Tue 11/11Tue 11/18
STL - EYW • 1 stop
Cheapest one-way
$182
Typical prices: $240-303
Multiple Airlines
Tue 9/30
STL - EYW • 3 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Key West!
Booking Insights

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 August, where tickets cost $353 (return) on average. On the other hand, the most expensive months are March and June, where the average cost of round-trip tickets is $558 and $474 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, which saves you about 33% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonOctober
Cheapest flight$182
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly and prices are also 0% 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 $182 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, Star Alliance, and SkyTeam are the airline alliances operating flights between St. Louis and Key West, with SkyTeam being the most commonly used for this route.

  • 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 $452 and an overall rating of 7.9, 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.

Reviews of the 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.
7.9
DeltaOverall score based on 7954 reviews
8.5Crew
8.2Boarding
7.9Entertainment
7.3Food
7.9Comfort
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

this crew didn't care much. bumping carts into seats more times than i care to remember

Everything was fine except the entertainment was not working for half of the flight.

Easy boarding with an extremely kind attendant. Seats were spacious and we had 3 seats for 2 people so we could stretch out. Comfortable air flow and very attentive and hospital attendants. Bathrooms and food were the only negative. Bathrooms were so small you could hardly get in and close the door. I don’t think an obese person would fit or a person with a movement disability. Food was the trending food for flights, nonexistent. We spent $40 getting sandwich and snack at airport for our 6 hour flught.

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

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.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

There was no food available for this red eye... one little waffle cookie for a 6+ hour flight... thank God I was able to sleep some

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

This flight never occurred because AA couldn’t get their act together.

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.

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

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