S$221 Cheap Flights from Denver to St. Louis

View S$221 flight on Thu, 5 Mar, 2026Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to St. Louis Lambert Intl. Airport (STL)

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

Prices were available within the past 7 days and start at S$221 for one-way flights and S$373 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$373 Return, found 4 days ago
S$373
Return
found 4 days ago
Select Delta flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$373 found 4 days ago
Delta
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$389 Return, found 4 days ago
S$389
Return
found 4 days ago
Select Delta flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$389 found 4 days ago
United
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$393 Return, found 4 days ago
S$393
Return
found 4 days ago
Select United flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$393 found 4 days ago
United
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$406 Return, found 4 days ago
S$406
Return
found 4 days ago
Select United flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$406 found 4 days ago
Delta
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$409 Return, found 4 days ago
S$409
Return
found 4 days ago
Select Delta flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$409 found 4 days ago
United
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$412 Return, found 4 days ago
S$412
Return
found 4 days ago
Select United flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$412 found 4 days ago
Delta
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$418 Return, found 4 days ago
S$418
Return
found 4 days ago
Select Delta flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$418 found 4 days ago
American Airlines
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$420 Return, found 4 days ago
S$420
Return
found 4 days ago
Select American Airlines flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$420 found 4 days ago
Delta
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$421 Return, found 4 days ago
S$421
Return
found 4 days ago
Select Delta flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$421 found 4 days ago
United
Thu, 5 Mar - Mon, 9 Mar
DEN
Denver
STL
St. Louis
S$425 Return, found 4 days ago
S$425
Return
found 4 days ago
Select United flight, departing Thu, 5 Mar from Denver to St. Louis, returning Mon, 9 Mar, priced at S$425 found 4 days ago

Find the cheapest month to fly from Denver (DEN) to St. Louis (STL)

February is typically the cheapest month to fly

From S$69 - S$275 per traveller.

Frequently asked questions

How much is a flight from Denver Intl. Airport (DEN) to Lambert-St. Louis Intl. Airport (STL)?
Round-trip flights from Denver Intl. Airport (DEN) to STL start from S$373. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year — book ASAP so you don't miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from DEN to Lambert-St. Louis Intl. Airport (STL)?
Most flights can be cancelled online, but whether you are charged a fee depends on your airline. If you do have to cancel your escape, follow the instructions in the Customer Service Portal.
How do I find cheap flights from DIA airport to STL 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 DIA airport to STL flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Denver Intl. Airport (DEN) to STL?
With a flight distance of 1,250 kilometres, it's only a short hop from DEN to STL. It might be a quick one, but it's still worth bringing something to keep you entertained on board.
Which airlines fly direct from Denver Airport to St. Louis Lambert International Airport?
Many travellers choose to fly with Southwest Airlines (WN) from DIA airport to Lambert-St. Louis Intl. Airport (STL). This popular airline offers 178 flights every month, so you can easily find a flight time that's right for you. United Airlines (UA) is also worth considering. It offers 121 flights every month. Between these two airlines, you'll be able to find a good deal from Denver to St. Louis.
Are Denver Airport to Lambert Field flight tickets cheaper when they're purchased at the last minute?
It is possible to get a fantastic last-minute deal from Denver Intl. Airport (DEN) to Lambert Field, but it can also be hit-or-miss. As many airlines advertise prices up to 12 months in advance, it's worthwhile keeping an eye on fares early and being ready to book when you spot a bargain. Expedia compares carrier prices and updates flight deals all the time, so you can be sure you're always getting the latest offers.

Travel information

Origin airport
Denver Intl.
Destination airport
Lambert-St. Louis Intl.
Return price
S$372
Distance
1228 km
Average flight time
3 hours 3 mins

Book with confidence

Perfect flights from Denver to St. Louis

Your Journey from Denver to St. Louis

Start your unforgettable journey with Expedia. Our broad selection of flights from Denver to St. Louis caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including Delta, United, American Airlines. Our selection of flights from Denver Intl. to Lambert-St. Louis Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Denver to St. Louis Flights

Experience the joy of finding cheap flights from Denver Intl. to Lambert-St. Louis Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$221 and roundtrip prices from S$373*.
 

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Experience the Vibrant St. Louis

Picture yourself stepping off the plane in St. Louis and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Denver to St. Louis Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Denver to St. Louis.
 

Beyond the Flight – Exploring St. Louis

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*Note: Prices may vary based on availability and are subject to change.
Perfect flights from Denver to St. Louis

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