STL - EYW

$195 Find Cheap Flights from St. Louis to Key West - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$233
Typical prices: $310-$611
Multiple Airlines
Wed 10/31Sat 11/3
STL - EYW • 1 stop
Cheapest one-way
$214
Typical prices: $330-$469
Multiple Airlines
Thu 11/15
STL - EYW • 1 stop
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Key West. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
15 weeks
in advance
Our data shows that travelers who book at least 15 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 26% price drop
January
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Houston George Bush Intcntl (IAH)
Cheapest • Avg $418 (round-trip)
Atlanta Hartsfield-Jackson (ATL)
Shortest trip • 5h 18m (one-way)
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Insights
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We hope you love your trip to Key West!
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Booking Insights
Flight Deals

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

 
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, Oct 31 - Tue, Nov 3
Multiple Airlines Logo
4:26 pm - 11:19 amSTL  Lambert-St Louis-EYW Key West
17h 53m1 stop Orlando
Multiple Airlines Logo
1:16 pm - 5:40 pmEYW  Key West-STL Lambert-St Louis
29h 24m2 stops Tampa Atlanta Hartsfield-Jackson
$233Multiple Airlines
Sat, Oct 17 - Tue, Oct 20
Multiple Airlines Logo
4:30 pm - 10:19 amSTL  Lambert-St Louis-EYW Key West
16h 49m1 stop Orlando
Multiple Airlines Logo
1:16 pm - 5:40 pmEYW  Key West-STL Lambert-St Louis
29h 24m2 stops Tampa Atlanta Hartsfield-Jackson
$235Multiple Airlines
Sat, Oct 17 - Thu, Oct 22
Multiple Airlines Logo
4:30 pm - 10:19 amSTL  Lambert-St Louis-EYW Key West
16h 49m1 stop Orlando
Multiple Airlines Logo
10:59 am - 11:13 pmEYW  Key West-STL Lambert-St Louis
13h 14m1 stop Orlando
$241Multiple Airlines
Tue, Dec 1 - Sat, Dec 5
American Airlines Logo
7:26 am - 4:35 pmSTL  Lambert-St Louis-EYW Key West
8h 09m1 stop Chicago O'Hare Intl
American Airlines Logo
4:49 pm - 11:59 pmEYW  Key West-STL Lambert-St Louis
8h 10m1 stop Chicago O'Hare Intl
$303American Airlines
Wed, Dec 2 - Sat, Dec 12
American Airlines Logo
10:21 am - 4:55 pmSTL  Lambert-St Louis-EYW Key West
5h 34m1 stop Dallas/Fort Worth
American Airlines Logo
4:49 pm - 11:59 pmEYW  Key West-STL Lambert-St Louis
8h 10m1 stop Chicago O'Hare Intl
$303American Airlines
Tue, Jan 5 - Wed, May 19
United Airlines Logo
7:30 am - 3:12 pmSTL  Lambert-St Louis-EYW Key West
6h 42m1 stop Chicago O'Hare Intl
United Airlines Logo
4:05 pm - 10:54 pmEYW  Key West-STL Lambert-St Louis
7h 49m1 stop Chicago O'Hare Intl
$323United Airlines
Tue, Jan 19 - Tue, Jan 26
American Airlines Logo
7:25 am - 5:19 pmSTL  Lambert-St Louis-EYW Key West
8h 54m1 stop Chicago O'Hare Intl
American Airlines Logo
1:52 pm - 5:49 pmEYW  Key West-STL Lambert-St Louis
4h 57m1 stop Charlotte Douglas
$323American Airlines
Sat, Oct 10 - Sat, Oct 17
Delta Logo
2:25 pm - 8:01 pmSTL  Lambert-St Louis-EYW Key West
4h 36m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:40 am - 1:20 pmEYW  Key West-STL Lambert-St Louis
6h 40m1 stop Atlanta Hartsfield-Jackson
$373Delta
Sat, Oct 10 - Sat, Oct 17
Delta Logo
2:25 pm - 8:01 pmSTL  Lambert-St Louis-EYW Key West
4h 36m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:40 am - 1:20 pmEYW  Key West-STL Lambert-St Louis
6h 40m1 stop Atlanta Hartsfield-Jackson
$420Delta
Sat, Nov 7 - Thu, Nov 12
United Airlines Logo
6:00 am - 1:52 pmSTL  Lambert-St Louis-EYW Key West
6h 52m1 stop Newark
United Airlines Logo
2:50 pm - 9:40 pmEYW  Key West-STL Lambert-St Louis
31h 50m3 stops Newark Atlanta Hartsfield-Jackson Chicago O'Hare Intl
$536United Airlines
Booking Insights

Price, demand and travel trends for St. Louis to Key West flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from St. Louis to Key West with more confidence.

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

Tuesday is the cheapest day of the week to fly from St. Louis to Key West, it is 28% cheaper than the average day. Sunday is the most expensive day with flight prices 37% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • January is the cheapest month to fly from St. Louis to Key West at $316 round-trip.
  • October ($678) and September ($558) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 114% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from St. Louis to Key West the cheapest?

Flights from St. Louis to Key West are cheapest 15 weeks before departure. Booking in this window typically costs about 43% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for St. Louis to Key West flights

Low season

May

Cheapest flight

$214
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly and prices are also 26% 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

Your St. Louis to Key West flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from St. Louis to Key West?

    Flights from St. Louis to Key West usually depart from Lambert-St Louis (STL) and arrive at Key West (EYW).

  • What cabin classes can I book on flights from St. Louis to Key West?

    Two cabin classes are available on flights from St. Louis to Key West:

    • Economy Class
    • First Class

  • Which airports do connecting flights from St. Louis to Key West pass through?

    One-stop flights from St. Louis to Key West most commonly connect through:

    • Atlanta Hartsfield-Jackson (ATL) - 48% of one-stop connections
    • Charlotte Douglas (CLT) - 29% of one-stop connections
    • Miami (MIA) - 11% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 9% of one-stop connections

    Atlanta Hartsfield-Jackson (ATL) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from St. Louis to Key West?

    Yes. Being flexible with your travel dates can save you up to 48% on the St. Louis to Key West route. Tuesday is the cheapest departure day at $308 round-trip on average, while Sunday is the most expensive at $586, a difference of $278. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Key West?

    Some of the most popular sights in Key West are Duval Street, Key West Historic District and Mallory Square. These are among the most viewed places in Key West on KAYAK.

  • How expensive are last-minute St. Louis to Key West flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 39% above the route average of $425. Book 15 weeks before departure for the lowest fares.

  • How long is a flight from St. Louis to Key West?

    A nonstop flight from St. Louis to Key West takes 0h 00m, covering 1,102 miles.

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

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • How are flight prices from St. Louis to Key West looking right now?

    One-way fares from St. Louis to Key West are currently in line with typical prices for this route. Average one-way fares are about $370.

  • How much time can I save by choosing a different layover airport from St. Louis to Key West?

    Flying via Atlanta Hartsfield-Jackson (ATL) gives the shortest average 1-stop total travel time at 5h 18m, compared with 5h 23m via Miami (MIA) and 5h 25m via Charlotte Douglas (CLT).

  • What is the time difference between St. Louis and Key West?

    Key West is 1 hour ahead of St. Louis (Eastern Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Key West Airport (EYW)?

    Key West Airport (EYW) hosts 5 major car rental companies, with daily rates starting from around $29 for economy cars. Top options include:
    • Dollar
    • Hertz
    • Budget
    • Enterprise Rent-A-Car
    • Alamo

  • How much should I expect to pay for a St. Louis to Key West flight?

    Round-trip flights from St. Louis to Key West range from $310 to $611, with an average of $425 over the past 12 months. Anything below $310 counts as a good deal.

Your guide to booking St. Louis to Key West flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Tuesday departure instead of Sunday. On this route, Tuesday flights average $308 - about $278 less than Sunday (47% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 15 weeks before you fly. On this route, that window historically saves about 43% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your St. Louis to Key West trip for January. Fares historically average $316 round-trip in that month - typically $362 less than the most expensive month, which is October (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Key West Airport.
    - Havana Cabana at Key West
    - Fairfield Inn & Suites by Marriott Key West at The Keys Collection
    - Parrot Key Hotel & Villas

More options for your flight from St. Louis to Key West

Complete your trip to Key West with a hotel stay or car rental

Car rentals in Key West
Hotels in Key West
Vacations in Key West