Cheap Flights from St. Louis to Denver starting at S$ 42

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

Round-trip
One way

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

Cheapest time to fly from St. Louis to Denver

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

Cheapest flights

From price

Apr

30 6
6 13
13 20
20 27
May

27 4
4 11
11 18
18 25
Jun

25 1
1 8
8 15
15 22

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

Frequently Asked Questions

When to buy 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 is a flight from St. Louis (STL) to Denver (DEN) cost?

According to Trip.com's data, the lowest price is around S$ 494.
How long is a flight from St. Louis (STL) to Denver (DEN)?

It takes about 2 hours 39 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 05:25 and arrives in Denver (DEN) at 12:35.
What time does the latest flight from St. Louis to Denver depart?

The latest flight departs from St. Louis (STL) at 20:15 and arrives in Denver (DEN) at 21:30.
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, Air Canada, Frontier 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?

There are 1 airports near Denver: 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.

Choose your dates flexibly and get the best deals on flights from St. Louis to Denver.

Tap 'Date' on the flight search bar to browse the calendar for St. Louis to Denver airfare over the next 6 months in 2025. If you're looking to fly within the next 3 months, the cheapest date seems to be Wed, Apr 16, with one-way flights starting at S$ 42.

Compare cheap flight deals from hundreds of airlines for St. Louis to Denver flights.

Our extensive search lets you compare prices from over 500 airlines to find the cheapest flights from St. Louis to Denver. The cheapest flight at the moment is with Frontier Airlines.

Set up a Price Alert

Set up a Price Alert for your St. Louis to Denver flights and track ticket prices easily—no need for daily checks.

Don't miss out on cheap deals and promo codes for St. Louis to Denver flights.

You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. Sign up for a free membership for more exclusive flight deals.

Book early or wait for last-minute deals.

It's always better to book early. Flight tickets are often at their lowest when first released, usually a year ahead of departure. Keep an eye out as soon as your desired flights open for booking. If you miss the early deals, you may still find lower prices closer to your travel date.

Search for flights on the go.

For the best flight booking experience on the go, download Trip.com and search for cheap flights from St. Louis to Denver to get your exclusive deals.

Find cheapest flight ticket from St. Louis to Denver

Cheapest one-way flight price	S$ 41
Cheapest return ticket price	S$ 80
Off-season for travel	March
Peak season for travel	July
Flight distance	1,253.6km
Average flight time	2 hours 39 minutes
Popular airline	Delta Air Lines