CA $120 Cheap Flights from Denver (DEN) to St. Louis (STL)

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

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

Prices were available within the past 7 days and start at CA $120 for one-way flights and CA $417 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
American Airlines
American Airlines
Delta
United
Delta
United
United
United
Alaska Airlines

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

September is typically the cheapest month to fly

From CA $66 - CA $181 per traveller.

Graph displaying average flight prices per month

Flight from Denver to St. Louis (DEN - STL) route information
Origin airport
Denver Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta
Roundtrip price
CA $290
Distance
1228 km
Average flight time
3 hours 5 mins

Denver to St. Louis Flights

The easy way to book your flights from Denver to St. Louis 

With Expedia, it’s simple to find and book flights to St. Louis from Denver whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Lambert-St. Louis Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Denver to St. Louis today, tomorrow, or this week.  

 

Save dollars with cheap flights from Denver Intl., DEN to Lambert-St. Louis Intl., STL 

Sort your search results by price to find great deals on your flight from Denver to St. Louis—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to St. Louis from Denver currently is just CA $417 rising to CA $622.  

Here are more money-saving tips: 

  • Fly in November when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to St. Louis  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to St. Louis from Denver 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to St. Louis with Expedia today.

Frequently asked questions

How much is a flight from Denver Intl. Airport (DEN) to STL?
The lowest price advertised for a round-trip flight between Denver Airport and Lambert-St. Louis Intl. Airport (STL) is CA $417. But you better act quick. This figure is based on fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from DIA airport to Lambert-St. Louis Intl. Airport (STL)?
The majority of flights can be conveniently cancelled online, but whether you incur a fee differs between airlines. If you do have to cancel your getaway, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from DIA airport to STL that have flexible change policies?
Plenty of airlines offer the option to reschedule your flight at no extra charge. All you pay is the cost difference between the two flights. When searching for DEN to Lambert Field flights, you'll find a "No change fees" filter for you to select.
How many hours is the flight from Denver Airport to Lambert Field?
With the average flight time between DEN and Lambert Field only 2 hours and 5 minutes, you'll be strolling around St. Louis before you know it.
How far is the flight from Denver Airport to Lambert Field?
That new movie you've been wanting to see will just have to wait — the flight distance between DIA airport (DEN) and Lambert Field (STL) is only 1,250 kilometres. The captain will be asking you to buckle up for touchdown before you know it.
Which airlines fly direct from Denver Airport to Lambert Field?
Many people choose to fly with Southwest Airlines (WN) from Denver Intl. Airport (DEN) to Lambert-St. Louis Intl. Airport (STL). This leading airline offers 147 flights monthly, so you can easily find a flight time that's right for you. United Airlines (UA) is also worth considering. It operates 91 flights every month. Between these two airlines, you'll be able to find a great deal from Denver to St. Louis.
Are Denver Intl. Airport (DEN) to STL flight tickets cheaper when they're purchased at the last minute?
Late planners can occasionally pick up a bargain, with some of the cheapest airfares from Denver Airport to STL popping up a few weeks before the departure date. If you'd rather plan ahead, Expedia compares and updates the best flight deals continuously — as early as 12 months in advance in some cases. It does depend on the carrier though, as not all airlines publish prices that far in advance.

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