$29 Cheap flights from Denver Intl. to Lambert-St. Louis Intl. (DEN to STL)

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Find The Best Dates To Fly from Denver Intl. to Lambert-St. Louis Intl.

Amazing DEN to STL Flight Deals

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were $58 round trip and $29 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Jan 11 - Sat, Jan 18
DEN
Denver
STL
St. Louis
$58 Roundtrip, found 2 hours ago
$58
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Jan 11 from Denver to St. Louis, returning Sat, Jan 18, priced at $58 found 2 hours ago
Wed, Jan 1 - Sat, Jan 11
DEN
Denver
STL
St. Louis
$63 Roundtrip, found 1 day ago
$63
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Jan 1 from Denver to St. Louis, returning Sat, Jan 11, priced at $63 found 1 day ago
Wed, Jan 1 - Wed, Jan 8
DEN
Denver
STL
St. Louis
$65 Roundtrip, found 1 day ago
$65
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Jan 1 from Denver to St. Louis, returning Wed, Jan 8, priced at $65 found 1 day ago
Sat, Jan 11 - Sat, Jan 18
DEN
Denver
STL
St. Louis
$68 Roundtrip, found 2 days ago
$68
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Jan 11 from Denver to St. Louis, returning Sat, Jan 18, priced at $68 found 2 days ago
Wed, Feb 12 - Sat, Feb 15
DEN
Denver
STL
St. Louis
$73 Roundtrip, found 4 days ago
$73
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Wed, Feb 12 from Denver to St. Louis, returning Sat, Feb 15, priced at $73 found 4 days ago
Wed, Mar 26 - Wed, Apr 2
DEN
Denver
STL
St. Louis
$75 Roundtrip, found 2 days ago
$75
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Mar 26 from Denver to St. Louis, returning Wed, Apr 2, priced at $75 found 2 days ago
Sat, Feb 15 - Sat, Feb 15
DEN
Denver
STL
St. Louis
$78 Roundtrip, found 4 days ago
$78
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sat, Feb 15 from Denver to St. Louis, returning Sat, Feb 15, priced at $78 found 4 days ago
Mon, Mar 24 - Wed, Mar 26
DEN
Denver
STL
St. Louis
$80 Roundtrip, found 1 day ago
$80
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Mar 24 from Denver to St. Louis, returning Wed, Mar 26, priced at $80 found 1 day ago
Wed, Jan 1 - Wed, Jan 15
DEN
Denver
STL
St. Louis
$83 Roundtrip, found 1 day ago
$83
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Jan 1 from Denver to St. Louis, returning Wed, Jan 15, priced at $83 found 1 day ago
Wed, Jan 8 - Mon, Jan 13
DEN
Denver
STL
St. Louis
$88 Roundtrip, found 6 hours ago
$88
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Wed, Jan 8 from Denver to St. Louis, returning Mon, Jan 13, priced at $88 found 6 hours ago

Frequently asked questions

Are there direct flights from DEN to St. Louis Lambert International Airport?
Sometimes, a trip is all about the journey; other times, the magic is in the destination. But if you just want to get to your destination fast, multiple airlines have direct flights from DEN to Lambert Field, including Southwest Airlines and United Airlines.
How long is the flight from Denver Intl. Airport (DEN) to STL?
You’ll only have enough time to get through a few chapters in your favorite novel as the journey from DIA airport to Lambert Field is only 2 hours. You may just find yourself left on a cliffhanger!
What is the flight distance from Denver Intl. Airport (DEN) to Lambert-St. Louis Intl. Airport (STL)?
From DEN, you’ll travel 770 mi before touching down at STL. That should give you enough time to finish a few chapters of your novel and perhaps even manage a short power nap.
What airlines fly from Denver Airport to STL?
If you want to get to St. Louis from Denver, there are several airlines that offer direct flights. One of the leading carriers is Southwest Airlines (WN), which operates 160 flights on this route each month. You should also look up the deals on offer from United Airlines (UA). Another popular airline, it operates 121 flights monthly on the Denver to St. Louis route. Compare the two airlines to find your perfect fare.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

 

Traveling From
Denver Intl.
Traveling To
Lambert-St. Louis Intl.
Shortest Flight Time
3 hours 55 mins
Earliest Departure Time
6:00AM CST
Latest Departure Time
9:55PM CST
Lowest Flight Price
$58

Route Info

Flight path for flights from Denver International Airport to Lambert-St. Louis International Airport


Origin:
DEN - Denver International Airport
Destination:
STL - Lambert-St. Louis International Airport
Distance:
772.00 miles


Airlines & Aircraft Used on DEN to STL Flight Routes


Airline Carrier
Aircraft
United Airlines
Boeing 737 all pax models
United Airlines
Boeing 737-800 (winglets) pax

Discover our best flights from Denver DEN to St. Louis STL. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from Denver DEN to St. Louis STL at the right price  

Airfares to St. Louis STL from Denver DEN currently cost between $58 and $88. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from Denver DEN to St. Louis STL 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Denver DEN to St. Louis STL on Travelocity starting at $29. Prices and availability subject to change. Additional terms may apply. 

 

Get to St. Louis STL from Denver DEN quicker with direct flights. 

Get to St. Louis faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to STL from DEN to take around 3 hour(s) 55 min(s).  

 

Find our cheapest airfares for flights from Denver DEN to St. Louis STL

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to STL from DEN. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from Denver DEN to St. Louis STL today 

If you’re flexible about when you travel, January is usually the cheapest month to fly from Denver DEN to St. Louis STL. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to St. Louis STL from Denver DEN 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to STL from DEN have this option.  

 

Travel with confidence when you book flights to St. Louis STL from Denver DEN with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.