Whether you're traveling for business or pleasure, solo, or with the whole family, you'll enjoy the flexibility of flying Southwest®.
Find your next flight from Denver to St. Louis now!
Looking for low fares? Check out this upcoming flight:
Denver, CO to St. Louis, MO
*Restrictions and exclusions apply. Seats and dates are limited. Select markets. 17 travel days available. Fares are updated hourly. Fares displayed on external channels may no longer be available at time of booking. To find the most updated fare, please visit Southwest.com.
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Find low faresTravel tips for your next Southwest flight
How to board the plane earlier:
Southwest seats are first come, first served based on check-in order. But there are ways to board the plane earlier!
- Purchase EarlyBird Check-In®1 for automatic check-in and a better boarding position.
Enjoy movies, sips, and snacks during your flight.
Take advantage of inflight entertainment with free movies4, free live TV5, free texting6, and $8 inflight Internet7.
We also offer free sodas, coffee, and snacks8—learn more about the inflight food and beverage experience.
Take advantage of free same-day standby9.
Have a change of travel plans? We offer free same-day standby for all fare types. This means that you can retain your current flight while listing for standby on an earlier flight. If a seat becomes available, it’s yours at no charge!
Make the most of our Rapid Rewards® Program.
Rapid Rewards Members can redeem their points for flights, hotel stays, rental cars, gift cards, and more. And your points never expire!
| Fare | Fly one-way from $109 (departing on 4/9)* |
|---|---|
| Departing from | Denver International Airport (DEN) |
| Arriving at | Lambert-St. Louis International Airport (STL) |
| Average flight time | 2 hours 2 minutes |
| Distance | 770 miles |
| 130† | Weekly flights |
|---|---|
| 6‡ | Nonstop flights per day Monday through Friday |
| 5 ‡ | Nonstop flights on Saturday |
| 6 ‡ | Nonstop flights on Sunday |
Other popular flights from Denver:
†Weekly flights based on DOT published scheduled average flights Monday through Sunday between 3/1/2025 and 3/31/2025. Note: route may not operate every day of the week.
‡Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 3/1/2025 and 3/31/2025.
Explore St. Louis.
There’s so much to see in St. Louis, that it’s no wonder they call Missouri the Show-Me State! First and foremost, is St. Louis’ most famous landmark, the Gateway Arch! Built as a monument to the country's westward expansion, the Gateway Arch is an engineering marvel that spans 630 feet from leg to leg while rising 630 feet into the air! While you’re checking out the arch, you can learn more about it at the Museum of Westward Expansion and the Gateway Arch Visitors Center. The park surrounding the arch features miles of bike paths, and you can even hitch a ride to the top to take in some truly incredible aerial views of the city.
If you like the park surrounding Gateway Arch, you’ll like Forest Park even better. Almost double the size of New York’s famous Central Park, this aptly named urban park truly is sized more like a forest than a park, with a whopping 1,371 acres of meadows, trees, ponds, lakes, streams, golf courses, tennis courts, sculptures, wetlands, and wildlife. Originally built in 1876, Forest Park was the home of the 1904 World’s Fair and remains steeped in St. Louis history to this day. Known as the Heart of St. Louis, Forest Park is also home to great attractions like the St. Louis Zoo, the Saint Louis Art Museum, the St. Louis Science Center, and the Missouri History Museum.
Questions we hear the most
The average flight time from Denver to St. Louis is 2 hours 2 minutes.
There are 130 weekly flights from Denver to St. Louis on Southwest Airlines.
Yes, Southwest flies nonstop from Denver to St. Louis 6 times per day from Monday through Friday.
Yes, Southwest flies nonstop from Denver to St. Louis 5 times per day on Saturdays and 6 times per day on Sundays.
To find the lowest fares by day and time to fly Denver to St. Louis with Southwest, check out our Low Fare Calendar.
You can rent a car at Lambert-St. Louis International Airport—book yours with your flight.
Yes! Flights from Denver to St. Louis—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Visit the Southwest Airlines® Help Center for helpful information and answers to frequently asked questions.
1EarlyBird Check-In® pricing starts at $15 one-way, and is subject to availability. Pricing may vary based on the popularity and length of each (one-way) flight. Please see optional travel charges for more details.
2Upgraded boarding prices and benefits are per eligible segment. Flights must be within 24 hours of departure to be eligible for upgraded boarding.
4Where available. Available only on WiFi-enabled aircraft. Limited-time offer.
5Due to licensing restrictions, on WiFi-enabled international flights, free live TV and iHeartRadio may not be available for the full duration of flight.
6Texting only allows access to iMessage and WhatsApp (which must be downloaded and activated before connecting to SouthwestWiFi).
7Internet access for $8 per device from takeoff to landing. Price is subject to change. May not be available for the full duration of flight. In order to provide a top-notch Internet experience, we prohibit access to certain high-bandwidth applications and websites. We also prohibit access to certain obscene or offensive content.
8Flights traveling 175 miles or less will have only water available. Complimentary snacks are served on flights over 175 miles. If you’re flying between Hawaii and the continental U.S., you’ll have even more snacks to choose from.
9Free same-day standby: You can list for same-day standby for an earlier flight via a Southwest Customer Service Agent at the airport or the Southwest app or mobile web. You must request to be added to the same-day standby list at least 10 minutes prior to the scheduled departure of your original flight or the no-show policy will apply. If using the app or mobile web, you must list your name 30 minutes ahead of scheduled departure. You will receive a message based on the contact preference selected during booking if you are cleared on the flight. Group bookings and Unaccompanied Minors are not eligible for same-day standby. You will be required to pay any government taxes and fees associated with these itinerary changes but refunds will be provided. Your original boarding position is not guaranteed on your standby flight. Southwest Business Customers booked through travel agencies may need to see a Southwest agent at the airport for a standby listing. See Southwest.com/standby for more details.