US$17️ Cheap Flights from Denver to St. Louis (2024)

Flights from Denver to St. Louis

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Find cheap one-way flights from Denver to St. Louis starting at US$17.

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

One way
Round-trip

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

When is the cheapest time to book flights from Denver to St. Louis?

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

Cheapest airlines flights from Denver to St. Louis

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From US$17

Delta Air Lines

From US$71

United Airlines

From US$92

Sun Country Airlines

From US$94

American Airlines

From US$96

Southwest Airlines

From US$104

Alaska Airlines

From US$181

ANA airlines

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Find cheap flights from Denver to St. Louis by different airports

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Denver to St. Louis.

Cheapest
DEN
06:26
2h 10m
Direct
STL
09:36
Denver International Airport - St.Louis Lambert International Airport
Wed, May 22Frontier Airlines
US$17
DEN
06:26
2h 10m
Direct
STL
09:36
Denver International Airport - St.Louis Lambert International Airport
Wed, May 22Frontier Airlines
US$17
Find More Flights

Frequently Asked Questions

When are flight tickets from Denver (DEN) to St. Louis (STL) the cheapest?
Airlines adjust prices for flights from Denver to St. Louis based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much do flights from Denver (DEN) to St. Louis (STL) cost?
According to Trip.com's data, the lowest price is around $241.
How long does it take to fly from Denver (DEN) to St. Louis (STL) and what is the distance?
It takes around 2 hours 58 minutes to fly from Denver (DEN) to St. Louis (STL).
What is the transportation method from the main airport to downtown in St. Louis?
- The distance from St. Louis Lambert International Airport to downtown is about 20km. It takes about 40 minutes by taxi.
What are the most popular airlines that fly from Denver (DEN) to St. Louis (STL)?
Airlines with flights from Denver (DEN) to St. Louis (STL): Southwest Airlines, Frontier Airlines, United Airlines and Volaris.

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

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 Denver to St. Louis. Book your flights at the right time and save more.

Book Early

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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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Denver to St. Louis Flight Information

Cheapest nonstop flight price	$16
Cheapest round-trip ticket price	$36
Off-season for travel	January
Peak season for travel	July
Flight distance	1,253.6km
Average flight time	2 hours 58 minutes
Popular airline	United Airlines