Cheap Flight Deals from St. Louis to Denver

We've found these cheap flights for you. You can book one-way or return flight tickets.

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

Best Time to Book Flights from St. Louis to Denver

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

9 16
16 23
23 30
Apr

30 6
6 13
13 20
20 27
May

27 4
4 11
11 18
18 25
Jun

25 1

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

FAQ

When are flight 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 lowest 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 AU$ 584.
How long is the flights from St. Louis (STL) to Denver (DEN)?

It takes about 6 hours 44 minutes to fly from St. Louis (STL) to Denver (DEN).
What time does the earliest flight from St. Louis to Denver depart?

The earliest flight departs from St. Louis (STL) at 08:40 and arrives in Denver (DEN) at 10:10.
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): United Airlines, Southwest Airlines and Volaris.
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

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Denver. Book your flights at the right time and save more.

Book Early

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

Compare Flight Prices

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Look Out for Deals

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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

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Flight Information from St. Louis to Denver

Cheapest direct flight price	AU$ 45
Cheapest return ticket price	AU$ 91
Off-season for travel	March
Peak season for travel	June
Flight distance	1,253.6km
Average flight time	6 hours 44 minutes
Popular airline	Delta Air Lines