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St. Louis

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

EYW — STL
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Find flight deals from Key West to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Key West (EYW) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Popular in

December

Cheapest in

June

Average price

$412
Provider with most accurate pricing for Key West-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Key West-Lambert-St Louis flights.
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($101 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Compare providers for flights from Key West to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Key West to St. Louis in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Key West-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Key West-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Key West-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Key West-St. Louis flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Key West-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Key West to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Key West with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Key West to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Key West to St. Louis (average of $244). Flying from Key West to St. Louis in December is currently the most expensive (average of $862). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated January 21, 2026.
Get a feel of what it's like to fly with Delta and American Airlines from Key West to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,089 reviews

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
7.9
Good
8,089 reviews
Delta
7.9
Good
8,089 reviews

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
11,174 reviews
Delta
7.9
Good
8,089 reviews

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

Find useful and relevant information for your journey from Key West to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Key West to St. Louis round-trip?

    Delta, at $240, was found to be the cheapest airline from Key West to St. Louis. An alternate airline flying to your destination would be American Airlines. These flights start at 41% lower than the current average price 3 months from now.

  • Can I find deals for flights from Key West to St. Louis that include hotel bookings?

    Yes. In addition to deals on Key West to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key West to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key West to St. Louis.

  • Can I find deals for business class flights from Key West to St. Louis?

    Yes. Cheapflights offers flight deals from Key West to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, August is the cheapest month in which you can book a flight from Key West to St. Louis (average of $244). Flying from Key West to St. Louis in December is currently the most expensive (average of $862). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

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Top 2 airlines flying from Key West to St. Louis

Discover the top 2 airlines that operate flights from Key West to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$240Average$338FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$258Average$388FlexibilityNo cancel feeOn-time71%

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