€125 Cheap Flights St. Louis to Denver (STL-DEN)

View €125 flight on Mon, 3 Mar 2025Opens in a new window

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Cheap flights from St. Louis to Denver (STL-DEN)

Prices were available within the past 7 days and start at €125 for one-way flights and €272 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, 10 Mar - Mon, 17 Mar
STL
St. Louis
DEN
Denver
€272 Return, found 6 days ago
€272
Return
found 6 days ago
Select Delta flight, departing Mon, 10 Mar from St. Louis to Denver, returning Mon, 17 Mar, priced at €272 found 6 days ago
United
Mon, 10 Mar - Mon, 17 Mar
STL
St. Louis
DEN
Denver
€281 Return, found 6 days ago
€281
Return
found 6 days ago
Select United flight, departing Mon, 10 Mar from St. Louis to Denver, returning Mon, 17 Mar, priced at €281 found 6 days ago
United
Mon, 10 Mar - Mon, 17 Mar
STL
St. Louis
DEN
Denver
€282 Return, found 6 days ago
€282
Return
found 6 days ago
Select United flight, departing Mon, 10 Mar from St. Louis to Denver, returning Mon, 17 Mar, priced at €282 found 6 days ago
American Airlines
Mon, 10 Mar - Mon, 17 Mar
STL
St. Louis
DEN
Denver
€288 Return, found 6 days ago
€288
Return
found 6 days ago
Select American Airlines flight, departing Mon, 10 Mar from St. Louis to Denver, returning Mon, 17 Mar, priced at €288 found 6 days ago
American Airlines
Mon, 10 Mar - Mon, 17 Mar
STL
St. Louis
DEN
Denver
€298 Return, found 6 days ago
€298
Return
found 6 days ago
Select American Airlines flight, departing Mon, 10 Mar from St. Louis to Denver, returning Mon, 17 Mar, priced at €298 found 6 days ago
Delta
Tue, 11 Mar - Sat, 15 Mar
STL
St. Louis
DEN
Denver
€302 Return, found 2 days ago
€302
Return
found 2 days ago
Select Delta flight, departing Tue, 11 Mar from St. Louis to Denver, returning Sat, 15 Mar, priced at €302 found 2 days ago
Delta
Mon, 10 Mar - Mon, 17 Mar
STL
St. Louis
DEN
Denver
€305 Return, found 6 days ago
€305
Return
found 6 days ago
Select Delta flight, departing Mon, 10 Mar from St. Louis to Denver, returning Mon, 17 Mar, priced at €305 found 6 days ago
Delta
Mon, 10 Mar - Mon, 17 Mar
STL
St. Louis
DEN
Denver
€306 Return, found 6 days ago
€306
Return
found 6 days ago
Select Delta flight, departing Mon, 10 Mar from St. Louis to Denver, returning Mon, 17 Mar, priced at €306 found 6 days ago
United
Mon, 10 Mar - Mon, 17 Mar
STL
St. Louis
DEN
Denver
€308 Return, found 6 days ago
€308
Return
found 6 days ago
Select United flight, departing Mon, 10 Mar from St. Louis to Denver, returning Mon, 17 Mar, priced at €308 found 6 days ago
American Airlines
Tue, 11 Mar - Sat, 15 Mar
STL
St. Louis
DEN
Denver
€311 Return, found 2 days ago
€311
Return
found 2 days ago
Select American Airlines flight, departing Tue, 11 Mar from St. Louis to Denver, returning Sat, 15 Mar, priced at €311 found 2 days ago
St. Louis to Denver route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Denver Intl.
Return price
€271
Distance
1228 km

Perfect flights from St. Louis to Denver

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from St. Louis to Denver. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of Denver, surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Lambert-St. Louis Intl. to Denver Intl. ticket options cater to your travel preferences, with incredible one-way fares from €125 and roundtrip prices from €272. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Denver Intl. and explore Denver and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your STL to DEN travel arrangements today and embark on the journey of a lifetime in Denver.

Frequently asked questions

How much is a flight from St. Louis Lambert International Airport to DIA airport?
Pack your bags, because round-trip flights from Lambert Field to DIA airport start from €272. That’s based on fares advertised within the last 7 days on Expedia for flights departing within the next year. Prices can change quickly, so book now to nab the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from St. Louis Lambert International Airport to Denver Intl. Airport (DEN)?
Every air carrier has its own terms and conditions. If you do decide to cancel, follow the simple instructions on our Customer Service Portal.
How do I find cheap flights from Lambert Field to DIA airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for St. Louis Lambert International Airport to DIA airport flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Lambert Field to Denver Intl. Airport (DEN)?
That new movie you’ve been eager to see will have to wait — the flight distance between Lambert Field and Denver Airport is only 1,250 kilometres. The captain will be instructing you to put your seat upright for landing before you know it.
Which airlines fly direct from STL to DEN?
Southwest Airlines (WN) is one of the top choices for many travellers flying between Lambert Field and DEN. Select from the 178 flights it operates on this route each month. You could also take a look at fares with United Airlines (UA). This carrier operates 121 flights a month between St. Louis and Denver.
Are St. Louis Lambert International Airport to Denver Airport flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from St. Louis Lambert International Airport to Denver Airport can be hit-or-miss. It is possible to find a bargain, but then again, you could miss out entirely! If you’d prefer to play it safe and start your trip planning early on, Expedia compares flight deals up to 12 months in advance. Just keep in mind that not all airlines release their prices so far in advance. Our top tip? Check back often as prices are updated frequently.
*Available to Expedia members.