Cheap Flights from St Louis to Key West International

Compare St Louis to Key West International flight deals

Find the cheapest month or even day of the year to fly to Key West International

Book the best Key West International fare with no extra fees

Flight deals from St Louis to Key West International

Looking for a cheap last-minute deal or the best return flight from St Louis to Key West International? Find the lowest prices on one-way and return tickets right here.

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

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

St Louis to Key West International: Alternative routes

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

St Louis to Key West: Flight information

The things to know before you go.
Cheapest flight foundRs165,953
Cheapest month to flyOctober

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

The best price we found for a return flight from St Louis to Key West International is Rs62,771. 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 St Louis to Key West International. But we found flights with one or more stops from Rs62,771.
As of October 2025, there are no flights flying from St Louis to Key West International.
The cheapest month to fly from St Louis to Key West International is usually January.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Key West International Airport on Saturday, 24 January 2026.
No airlines currently offer direct flights between St Louis Airport and Key West International 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 Key West International 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 Key West is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Delta offers the cheapest flight tickets to Key West International.

Travelling from Lambert-St. Louis International Airport (STL) to Key West International Airport (EYW): what you need to know

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This will give you enough time to catch your STL to EYW flight.

  • During popular months such as July, it's a good idea to get to the airport earlier. Plan to arrive two hours before a domestic departure and four hours ahead of an international flight whenever you're flying during peak periods in general.

  • If you'd like to include a stop along the way, simply deselect 'Direct flights only' when searching for your ticket from Lambert-St. Louis International Airport to Key West International Airport. These are the top stopovers between STL and EYW:

    • Hartsfield-Jackson Atlanta International Airport

    • Orlando International Airport

    • Pittsburgh International Airport

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

  • Currently, Rs165,953 is the cheapest price we've seen for a one-way Lambert-St. Louis International Airport to Key West International Airport flight. The best price for a return ticket is Rs62,771. Keep in mind that fares could change due to availability at the time of booking.

  • To score cheap tickets from STL to EYW, book as early as you can. Airlines generally offer their best fares when flights are first released.

  • The 'Whole month' search function shows you the cheapest flights from Lambert-St. Louis International Airport to Key West International Airport across the entire month. It's an easy way to snap up a bargain if your plans are flexible.

  • Finding cheap flights from STL to EYW couldn't be easier with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch as soon as there's a better deal.

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

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Key West International Airport (EYW)

Getting from Key West International Airport (EYW) to central Key West

  • EYW is located at 3491 South Roosevelt Boulevard.

  • Key West International Airport is approximately 3 kilometres from the centre of Key West. The drive time takes around 5 minutes.

  • It takes around 40 minutes if you're travelling on public transport.

When to fly to Key West International Airport (EYW)

  • It's time to choose your dates for your flight from Lambert-St. Louis International Airport to Key West International Airport. January is the busiest month to visit Key West. If you'd like a quieter vibe, go in February.

  • Lock in your flight from Lambert-St. Louis International Airport to Key West International Airport for August if you want to visit Key West during its warmest month. Expect temperatures of between 26ºC and 30ºC.

  • If you want to travel in cooler conditions, search for a cheap ticket from STL to EYW in January. Average temperatures are between 18ºC and 23ºC then.

Explore more of United States

  • You've visited Key West, now it's time to discover other parts of United States. Journey about 209 kilometres north-east to Miami to tick off its leading sights. From Wynwood Walls to Vizcaya Museum and Gardens and American Airlines Arena, there's plenty to keep you on the go.

  • Tampa is another standout destination in United States and is around 386 kilometres north of Key West. No trip is complete without seeing Ybor City Tattoo Company, Tampa Riverwalk and The Florida Aquarium.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.