Affordable Flights from St. Louis to Denver

Flying from St. Louis to Denver offers a convenient way to explore the Mile-High City and surrounding natural attractions. With multiple airlines and frequent flights, travelers from STL can find affordable fares to enjoy both leisure and business trips in Denver.

Round-trip flights generally range from USD 160 to USD 420 depending on season and airline. My Trips Time helps you compare carriers, travel times, and ticket prices to secure the best deal.

Best Time to Book Flights from St. Louis to Denver

Booking **4–6 weeks in advance** often ensures the lowest fares. Traveling during shoulder seasons, such as spring (March–May) and fall (September–October), tends to offer better prices compared to peak summer months.

Midweek flights, particularly on Tuesdays and Wednesdays, are usually cheaper. My Trips Time also provides fare alerts so you can snag the most affordable tickets.

Origin Airport: St. Louis Lambert International Airport (STL)

Depart from St. Louis Lambert International Airport (STL), Missouri’s largest airport. STL offers modern facilities, multiple airline options, and convenient access to downtown St. Louis, making it a smooth start for flights to Denver.

Destination Airport: Denver International Airport (DEN)

Arrive at Denver International Airport (DEN), the main airport serving Colorado. With excellent transportation links, car rentals, and amenities, travelers can easily reach downtown Denver or explore nearby mountain destinations.

DEN provides a seamless arrival experience with modern facilities for both business and leisure travelers.

Denver – Urban Adventure Meets Nature

Denver combines urban culture with outdoor adventure. Known for its vibrant neighborhoods, breweries, cultural sites, and proximity to the Rockies, it’s ideal for travelers seeking city life with easy access to nature.

Major Attractions:

Red Rocks Amphitheatre – iconic outdoor music venue
Denver Art Museum – diverse art collections
Union Station – restaurants, shops, and transport hub
Coors Field – home to the Colorado Rockies baseball team
Larimer Square – historic shopping and dining district
Denver Botanic Gardens – beautiful floral displays
Rocky Mountain National Park – hiking, skiing, and wildlife
City parks, breweries, cultural events, and outdoor recreation

Denver also offers scenic drives, local dining, cultural festivals, and adventure sports for visitors of all ages.

Airlines Flying from St. Louis to Denver

STL to DEN flights are available via multiple carriers offering nonstop and connecting options, catering to flexible schedules and budgets.

Southwest Airlines
American Airlines
Delta Air Lines
United Airlines
Frontier Airlines

My Trips Time lets you compare airlines, departure times, and layover durations, helping you choose the most convenient and affordable option.

Why Book with My Trips Time?

Competitive STL → DEN airfare deals
Secure and easy-to-use platform
Compare multiple airlines and routes
Transparent pricing with no hidden fees
Support for business and leisure travelers
Flexible booking options including round-trip and one-way flights

Frequently Asked Questions

Round-trip fares usually range from USD 160 to USD 420 depending on season and airline.

Depart from St. Louis Lambert International Airport (STL).

Yes, multiple airlines operate nonstop flights taking approximately 2.5–3 hours.

Booking 4–6 weeks in advance during shoulder seasons ensures the best fares.

Nonstop flights take about 2.5–3 hours, while one-stop flights may take 4–6 hours depending on layovers.