204 € Cheap Flights from Key West International to St Louis

Compare Key West International to St Louis flight deals

Find the cheapest month or even day of the year to fly to St Louis

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Flight deals from Key West International to St Louis

Looking for a cheap last-minute deal or the best return flight from Key West International Airport to St Louis Airport? If you want to travel next month, return fares start from 204 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Key West International to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Key West International to St Louis flights are currently cheapest in August.

Key West International to St Louis: Alternative routes

Compare routes from Key West International to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Key West to St Louis: Flight information

The things to know before you go.
Cheapest flight found204 €
Cheapest month to flyAugust

Finding cheap flights from Key West International to St Louis: Frequently asked questions

The best price we found for a return flight from Key West International to St Louis is 204 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Key West International to St Louis. But we found flights with one or more stops from 204 €.
As of July 2026, there are no flights flying from Key West International to St Louis.
The cheapest month to fly from Key West International to St Louis is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Key West International Airport to St Louis Airport on Friday, 7 August 2026.
No airlines currently offer direct flights between Key West International Airport and St Louis Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Breeze Airways offers the cheapest flight tickets to St Louis.

Flying from Key West International Airport (EYW) to St Louis Airport (STL): what you need to know

  • The timezone in St Louis is UTC-6, which is one hour behind Key West.

  • Give yourself plenty of time to catch your EYW to STL flight. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • You'll likely experience longer queues during popular months such as April. Arriving up to four hours in advance for international flights and two hours for a domestic departure will give you ample time for security and boarding.

  • Consider adding a stopover when booking your ticket from Key West International Airport to St Louis Airport. Just uncheck 'Direct flights only' to break up your trip, or visit a new city along the way. Here's where you can stop between EYW and STL:

    • Atlanta Hartsfield-Jackson Airport

    • Charlotte Douglas Airport

    • Miami International Airport

How to find the cheapest flights from Key West International Airport (EYW) to St Louis Airport (STL)

  • The cheapest price we've seen for a one-way Key West International Airport to St Louis Airport flight is 94 €. A return plane ticket right now is 204 €. Depending on the availability when you book, these fares could change.

  • To find cheap tickets from EYW to STL, book in advance. Airlines usually offer lower fares when flights are first made available.

  • Finding cheap flights from Key West International Airport to St Louis Airport is more likely if you're flexible with your trip dates. Use the 'Whole month' search function to see the best prices throughout the month and bag a great deal.

  • There's no need to check every day to see if fares have gone down when you set up a Price Alert. We'll notify you as soon as there's a better deal on cheap flights from EYW to STL.

  • Select your ideal arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Key West International Airport to St Louis Airport.

Handy information about Key West International Airport (EYW)

  • You'll find EYW at 3491 South Roosevelt Boulevard.

  • When it comes to Key West International Airport's on-time performance, 75% of flights arrive within the scheduled timeframe.

  • Key West International Airport is around 5 kilometres from central Key West. If you're ride-sharing, catching a taxi or driving from the centre, it'll take 10 minutes or so to get there, depending on the traffic.

  • The journey on public transport takes roughly 20 minutes.

  • Searching for a convenient hotel close to EYW? If you're boarding an early flight from Key West International Airport to St Louis Airport, these stays will have you moments from your check-in counter:

Arriving at St Louis Airport (STL)

When to fly to St Louis Airport (STL)

  • The quietest month for a flight from Key West International Airport to St Louis Airport is March, while July is the most popular. Pick the best time to go to St Louis based on whether you prefer a more fast-paced or easygoing experience.

  • When booking your flight from Key West International Airport to St Louis Airport, consider the type of weather you enjoy. July is the warmest month in St Louis, with temperatures ranging from 17ºC (63ºF) to 33ºC (91ºF).

  • If you like cooler conditions, search for a cheap ticket from EYW to STL in January. Average temperatures are between -7ºC (19ºF) and 8ºC (46ºF) then.

Explore more of the United States

  • Chicago is just one of the many cities in the United States waiting to be explored after you've seen St Louis. Around 418 kilometres away to the north-east, popular attractions include Millennium Park, Art Institute of Chicago and Willis Tower.

  • Indianapolis is another favourite destination in the United States and is around 370 kilometres east of St Louis. No journey is complete without seeing Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.