$100 Cheap Flights from Key West (EYW) to St. Louis (STL)

View $100 flight on Wed, May 28, 2025Opens in a new window

Popular airlines from Key West Intl. Airport (EYW) to St. Louis Lambert Intl. Airport (STL)

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Find available prices by choosing your travel dates.

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

Prices were available within the past 7 days and start at $100 for one-way flights and $238 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Jun 26 - Tue, Jul 1
EYW
Key West
STL
St. Louis
$238 Roundtrip, found 14 hours ago
$238
Roundtrip
found 14 hours ago
Select Delta flight, departing Thu, Jun 26 from Key West to St. Louis, returning Tue, Jul 1, priced at $238 found 14 hours ago
Delta
Sat, May 24 - Tue, Jun 3
EYW
Key West
STL
St. Louis
$251 Roundtrip, found 4 days ago
$251
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, May 24 from Key West to St. Louis, returning Tue, Jun 3, priced at $251 found 4 days ago
Delta
Thu, May 8 - Sun, May 25
EYW
Key West
STL
St. Louis
$253 Roundtrip, found 5 days ago
$253
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, May 8 from Key West to St. Louis, returning Sun, May 25, priced at $253 found 5 days ago
American Airlines
Tue, Sep 16 - Wed, Sep 24
EYW
Key West
STL
St. Louis
$255 Roundtrip, found 6 days ago
$255
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Sep 16 from Key West to St. Louis, returning Wed, Sep 24, priced at $255 found 6 days ago
American Airlines
Thu, Aug 14 - Sun, Aug 17
EYW
Key West
STL
St. Louis
$259 Roundtrip, found 12 hours ago
$259
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Thu, Aug 14 from Key West to St. Louis, returning Sun, Aug 17, priced at $259 found 12 hours ago
American Airlines
Wed, Jun 4 - Sun, Jun 8
EYW
Key West
STL
St. Louis
$264 Roundtrip, found 2 days ago
$264
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Jun 4 from Key West to St. Louis, returning Sun, Jun 8, priced at $264 found 2 days ago
Delta
Wed, Jun 11 - Tue, Jun 24
EYW
Key West
STL
St. Louis
$270 Roundtrip, found 5 days ago
$270
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Jun 11 from Key West to St. Louis, returning Tue, Jun 24, priced at $270 found 5 days ago
Delta
Fri, Jun 6 - Mon, Jun 9
EYW
Key West
STL
St. Louis
$274 Roundtrip, found 2 days ago
$274
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Jun 6 from Key West to St. Louis, returning Mon, Jun 9, priced at $274 found 2 days ago
Delta
Wed, May 28 - Wed, Jun 11
EYW
Key West
STL
St. Louis
$288 Roundtrip, found 5 days ago
$288
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, May 28 from Key West to St. Louis, returning Wed, Jun 11, priced at $288 found 5 days ago
United
Wed, Aug 27 - Sun, Aug 31
EYW
Key West
STL
St. Louis
$484 Roundtrip, found 2 days ago
$484
Roundtrip
found 2 days ago
Select United flight, departing Wed, Aug 27 from Key West to St. Louis, returning Sun, Aug 31, priced at $484 found 2 days ago

Frequently asked questions

How much does a flight from Key West Intl. Airport (EYW) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from EYW to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from EYW to STL?
The cheapest flights from EYW to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from EYW to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from EYW to STL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Key West Intl. Airport (EYW) to Lambert-St. Louis Intl. Airport (STL)?
There are no daily direct flights available from Key West Intl. Airport (EYW) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you’ll be cruising above the clouds before you know it.
What day of the week has the most flights from EYW to STL?
Usually you’ll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Key West Intl. Airport (EYW) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Key West Intl. Airport (EYW) to Lambert-St. Louis Intl. Airport (STL) route, fly before 3 PM. Later departures have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Key West Intl. Airport (EYW) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until just before your departure to book your flight from EYW to STL generally means paying more. While you may find some last-minute offers, they aren’t always guaranteed. Keep your travel plans flexible to boost your chances of getting a bargain.
Is it cheaper to book an EYW to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking an EYW to STL flight and hotel package with Expedia could result in significant savings. What’s more, managing everything in one place will take the stress out of planning your trip. Simply secure your flights and select from our wide range of hotels, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Key West Intl. Airport (EYW) to Lambert-St. Louis Intl. Airport (STL)?
Usually, it’s possible to cancel or reschedule your EYW to STL flight. However, if it’s been more than 24 hours since booking, additional fees may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and whether any costs are involved. You’ll also find further details on our Customer Service portal.
*Available to One Key members.