STL - EYW

$132 Find Cheap Flights from St. Louis to Key West - Compare and Save

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 9/9. 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, 0 bags

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Everything you should know

Cheapest round-trip
$248
Typical prices: $342-$646
Multiple Airlines
Sun 9/6Thu 9/10
STL - EYW • 2 stops
Cheapest one-way
$132
Overall average: $186
Multiple Airlines
Wed 9/9
STL - EYW • 2 stops
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Key West. You'll need at least 1 connection.
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Top layover airports
Houston (IAH)
Cheapest • Avg $418 (round-trip)
Atlanta (ATL)
Shortest trip • 5h 07m (one-way)
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When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 28% compared to booking last minute.
Insights
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When to travel
January
Cheapest • 31% price drop
January
Most popular
Good to know
Good to know
+1
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Good to know
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We hope you love your trip to Key West!
Flight Deals
Booking Insights
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

Sun, Sep 6 - Thu, Sep 10
Multiple Airlines Logo
6:17 pm - 11:27 am
STL
-
EYW
16h 10m
2 stops
Multiple Airlines Logo
10:59 am - 5:54 pm
EYW
-
STL
7h 55m
1 stop
$248Multiple Airlines
Tue, Oct 13 - Sun, Oct 18
Multiple Airlines Logo
10:35 am - 9:24 am
STL
-
EYW
21h 49m
2 stops
Multiple Airlines Logo
8:41 pm - 7:39 pm
EYW
-
STL
23h 58m
1 stop
$259Multiple Airlines
Sun, Aug 23 - Sun, Aug 30
Multiple Airlines Logo
6:17 pm - 12:34 pm
STL
-
EYW
41h 17m
2 stops
Multiple Airlines Logo
12:05 pm - 3:28 pm
EYW
-
STL
28h 23m
1 stop
$269Multiple Airlines
Tue, Sep 22 - Sat, Sep 26
American Airlines Logo
5:00 am - 10:57 am
STL
-
EYW
4h 57m
1 stop
American Airlines Logo
7:47 pm - 11:59 pm
EYW
-
STL
5h 12m
1 stop
$303American Airlines
Tue, Sep 22 - Sat, Sep 26
American Airlines Logo
10:21 am - 5:55 pm
STL
-
EYW
6h 34m
1 stop
American Airlines Logo
7:47 pm - 11:59 pm
EYW
-
STL
5h 12m
1 stop
$303American Airlines
Sat, Nov 28 - Sat, Dec 5
Delta Logo
2:31 pm - 8:02 pm
STL
-
EYW
4h 31m
1 stop
Delta Logo
7:35 am - 11:15 am
EYW
-
STL
4h 40m
1 stop
$303Delta
Tue, Nov 3 - Sat, Nov 7
Delta Logo
7:00 am - 2:20 pm
STL
-
EYW
6h 20m
1 stop
Delta Logo
6:11 pm - 11:54 pm
EYW
-
STL
6h 43m
1 stop
$303Delta
Sat, Dec 5 - Sat, Dec 12
United Airlines Logo
5:00 am - 1:11 pm
STL
-
EYW
7h 11m
1 stop
United Airlines Logo
4:05 pm - 9:13 pm
EYW
-
STL
6h 08m
1 stop
$303United Airlines
Sat, Dec 5 - Sat, Dec 12
United Airlines Logo
5:00 am - 1:11 pm
STL
-
EYW
7h 11m
1 stop
United Airlines Logo
4:05 pm - 9:13 pm
EYW
-
STL
6h 08m
1 stop
$393United Airlines
Sat, Oct 24 - Wed, Oct 28
United Airlines Logo
6:00 am - 2:18 pm
STL
-
EYW
7h 18m
1 stop
United Airlines Logo
2:50 pm - 9:52 pm
EYW
-
STL
8h 02m
1 stop
$393United Airlines
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.

How much is a round-trip flight from St. Louis to Key West?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Key West departing in September.

Flight prices are below average for this route right now.

Flights to Key West from St. Louis usually cost between $395 and $502 in September.
The lowest price found in the past 5 days was $248 on Multiple Airlines (Sep 6-Sep 10).

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 January, where tickets cost $316 (return) on average. On the other hand, the most expensive months are October and April, where the average cost of round-trip tickets is $656 and $586 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 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Find deals

Good to know

Low season

April

Cheapest flight

$132
Best time to beat the crowds but there is an average 27% increase in price.
Most popular time to fly and prices are also 32% 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 5 days, the lowest price for a flight from St. Louis to Key West was $132 for a one-way ticket and $259 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?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Key West, with Star Alliance 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 $414 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $448 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.

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

Information on your arrival and departure airports

St. Louis (STL)
Key West (EYW)