US$19️ Cheap Flights from St. Louis to Denver (2024)

Flights from St. Louis to Denver

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Find cheap one-way flights from St. Louis to Denver starting at CNY 19.

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 St. Louis to Denver?

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

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

Cheapest airlines flights from St. Louis to Denver

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

Frontier Airlines

From US$19

Delta Air Lines

From US$73

United Airlines

From US$93

Sun Country Airlines

From US$93

American Airlines

From US$97

Southwest Airlines

From US$146

Alaska Airlines

From US$174

ANA airlines

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

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

Cheapest
STL
20:04
2h 31m
Direct
DEN
21:35
St. Louis Lambert International Airport - Denver International Airport
Wed, May 1Frontier Airlines
US$19
STL
20:04
2h 31m
Direct
DEN
21:35
St. Louis Lambert International Airport - Denver International Airport
Wed, May 1Frontier Airlines
US$19
Find More Flights

Frequently Asked Questions

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 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 St. Louis (STL) to Denver (DEN) cost?
According to Trip.com's data, the lowest price is around $259.
How long does it take to fly from St. Louis (STL) to Denver (DEN) and what is the distance?
It takes around 3 hours 20 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): United Airlines, Frontier Airlines, Volaris and Southwest Airlines.

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

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

St. Louis to Denver Flight Information

Cheapest nonstop flight price	$19
Cheapest round-trip ticket price	$36
Off-season for travel	February
Peak season for travel	October
Flight distance	1,253.6km
Average flight time	3 hours 20 minutes
Popular airline	Delta Air Lines