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 $348 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.

Find Flights from Key West to St. Louis

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Key West to St. Louis

Popular in	April
Cheapest in	September
Average price	$326

Highest demand for flights based on searches. 9% potential increase in price ($38 potential increase over avg. RT price).

Search Deals

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

Search Deals

Average for round-trip flights in July 2025

Search Deals

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.

Related info for your journey

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.

See more FAQs

O'Fallon

Maryland Heights

Fairview Heights

Collinsville

Eureka

St. Peters

Glencoe

Alton

Festus

Chesterfield

Farmington

Browse thousands of different options on Cheapflights for your next trip

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$348	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

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 juillet 3, 2025.

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.

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 Key West?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Key West to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Key West to St. Louis

100% Free

Book with Flexibility

Travel Smart