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 29% lower than the current average price 3 months from now.

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

Travelers seeking maximum savings on their Key West to St. Louis flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What is the cheapest day to fly round-trip from Key West to St. Louis?

Wednesday is generally a great day to depart. Flying on this day could help you save up to 28%.

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

Our data shows that September tends to be the cheapest month to fly to St. Louis from Key West. Users have commonly found prices around $339 for the month, but tickets can be as low as $240. Due to multiple factors, prepare for potentially higher prices in April.

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.

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Cheap flight deals from Key West to St. Louis

Popular in	April
Cheapest in	September
Average price	$258

Highest demand for flights based on searches. 12% potential increase in price ($47 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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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 $311). Flying from Key West to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from EYW to STL?

When flying from Key West to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 4% versus a flight in the morning.

Reviews of airlines servicing St. Louis

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

8.0

Very good

7,980 reviews

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

8.0

Very good

7,980 reviews

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

6.0

Good

pilar,May 2025

RSW - ATL

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,980 reviews

Reviews

1 / 20

6.0

Good

pilar,May 2025

RSW - ATL

Related info for your journey

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 29% 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 $311). Flying from Key West to St. Louis in March is currently the most expensive (average of $356). 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.

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Top 2 airlines flying from Key West to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$240	Average$383	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$258	Average$338	FlexibilityNo cancel fee	On-time71%

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

Find cheap flights from Key West to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Key West to St. Louis

Popular in

Cheapest in

Average price

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.

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?

What is the cheapest time of day to fly from EYW to STL?

Find hourly flight availability from Key West to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated août 14, 2025.

Reviews of airlines servicing St. Louis

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.

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?

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

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

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

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

Traveling to a place near St. Louis?

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Alternative routes for Key West to St. Louis

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Top 2 airlines flying from Key West to St. Louis

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