Cheap Flights from St. Louis to Denver from £20️ (STL-DEN)

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Flights from St. Louis to Denver Starting at £20

Whether you’re going for a one-way or round-trip to Denver, we’ve got you covered! Check out these different flight options from St. Louis below.

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from St. Louis to Denver

Explore the best time to buy affordable tickets to Denver with our price trend chart, which predicts how flight prices will change in the coming weeks from previous data.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Alternative Routes from St. Louis to Denver

Searching for potential routes that might be cheaper and faster? There are a few alternative ways to get to Denver from St. Louis which could help you save money and time.

Cheapest
STL
19:09
2h 28m
Nonstop
DEN
20:37
St.Louis Lambert International Airport - Denver International Airport
Sat, Jan 25Frontier Airlines
£20
STL
19:09
2h 28m
Nonstop
DEN
20:37
St.Louis Lambert International Airport - Denver International Airport
Sat, Jan 25Frontier Airlines
£20
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FAQ

When are flight tickets from St. Louis (STL) to Denver (DEN) the cheapest?
Airlines adjust prices for flights from St. Louis to Denver based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from St. Louis (STL) to Denver (DEN) cost?
According to Trip.com's data, the lowest price is around £166.
How long is the flight from St. Louis (STL) to Denver (DEN)?
It takes about 2 hours 51 minutes to fly from St. Louis (STL) to Denver (DEN).
What are the most popular airlines that fly from St. Louis (STL) to Denver (DEN)?
Airlines with flights from St. Louis (STL) to Denver (DEN): Southwest Airlines, United Airlines, Volaris, Air Canada and Frontier Airlines.
What's the most popular airline for direct flights from St. Louis (STL) to Denver (DEN)?
Frontier Airlines operates 1 direct flights from St. Louis (STL) to Denver (DEN).
How many airports in Denver (DEN)?
There are 1 airport(s) in Denver (DEN): Denver International Airport.

How to find a cheap flight from St. Louis to Denver

If you don’t know some of the key things to look out for when buying flight tickets, prices can often end up sky high or, worse, sold out! We’ve carefully compiled our six most important steps to help ensure you’re getting the best deals when planning your next journey.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Flight Information from St. Louis to Denver

Cheapest direct flight price	£20
Cheapest return ticket price	£40
Off-season travel month	January
Peak season for travel	April
Flight distance	1,253.6km
Average flight time	2 hours 51 minutes
Popular airline	American Airlines