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Uncover the best deals on Denver to St Louis flights by comparing fares from hundreds of airlines and agencies.
Good to Know: Cheapest and Fastest DEN - STL Flights
Useful information for finding best airline tickets from Denver International to Lambert St Louis International on your next trip.
Cheapest Round Trip Flight
$297
Delta Airlines
• 1 stop
• 9h 8m
Aug 19 – Aug 20
The cheapest round trip flight from Denver to St Louis (DEN-STL-DEN) is currently $297
Cheapest One way Flight
$224
Southwest Airlines
• 1 stop
• 12h 5m
Aug 03
The cheapest one way flight from Denver to St Louis (DEN-STL) is currently $224
Cheapest Direct Flight
$301
Southwest Airlines
• nonstop
• 3h 25m
Aug 19
The cheapest nonstop flight from Denver to St Louis (DEN-STL) is currently $301
Fastest Flight
3h 20m
The fastest nonstop flight from Denver to St Louis (DEN-STL) takes 3h 20m
Top Airlines Flying from Denver to St Louis
Latest Flight Deals from Denver (DEN) to St Louis (STL)
Compare and book low fare round-trip air tickets from Denver to St Louis. Ideal for travelers with confirmed return itineraries.
Aug 19 - Aug 20, Economy
Denver → St Louis
9h 8m
4:33 PM - 11:21 PM • 1 stop
Denver → St Louis
12h 6m
3:39 PM - 10:05 PM • 1 stop
Delta Airlines
Aug 19 - Aug 20, Economy
Denver → St Louis
3h 20m
6:35 AM - 9:35 AM • nonstop
Denver → St Louis
5h 30m
8:30 AM - 11:00 AM • 1 stop
Southwest Airlines
Aug 19 - Aug 20, Economy
Denver → St Louis
7h 15m
4:35 PM - 10:10 PM • 1 stop
Denver → St Louis
3h 35m
8:30 AM - 9:45 AM • nonstop
Southwest Airlines
Aug 19 - Aug 20, Economy
Denver → St Louis
10h 19m
10:19 AM - 5:38 PM • 1 stop
Denver → St Louis
17h 6m
2:32 PM - 11:58 PM • 2 stops
Delta Airlines
Aug 19 - Aug 20, Economy
Denver → St Louis
11h 43m
5:35 AM - 1:38 PM • 1 stop
Denver → St Louis
17h 6m
2:32 PM - 11:58 PM • 2 stops
Delta Airlines
Explore competitive one-way airfare options for DEN - STL flights. Best suited for flexible or open-ended travel plans.
Flying to St Louis soon? We've surfaced some of the most affordable last-minute flights from Denver to St Louis, ideal for urgent plans or spontaneous trips.
Looking for the fastest way to St Louis? These direct flight options from DEN to STL offer both convenience and value—no layovers, just straight to your destination.
Aug 19 - Aug 20, Economy
Denver → St Louis
3h 25m
8:35 AM - 11:40 AM • nonstop
Denver → St Louis
3h 35m
6:25 AM - 7:40 AM • nonstop
Southwest Airlines
Aug 19 - Aug 20, Economy
Denver → St Louis
3h 25m
11:15 AM - 2:20 PM • nonstop
Denver → St Louis
3h 35m
12:45 PM - 2:00 PM • nonstop
Southwest Airlines
Aug 19 - Aug 20, Economy
Denver → St Louis
3h 35m
5:55 PM - 9:10 PM • nonstop
Denver → St Louis
3h 35m
6:25 AM - 7:40 AM • nonstop
Southwest Airlines
Aug 19 - Aug 20, Economy
Denver → St Louis
3h 20m
6:35 AM - 9:35 AM • nonstop
Denver → St Louis
3h 35m
8:30 AM - 9:45 AM • nonstop
Southwest Airlines
Aug 19 - Aug 20, Economy
Denver → St Louis
3h 25m
3:40 PM - 6:45 PM • nonstop
Denver → St Louis
3h 35m
8:45 PM - 10:00 PM • nonstop
Southwest Airlines
FAQs on Denver to St Louis Flights
What are the airports in Denver?
DEN
What’s the most popular airline flying from DEN to STL?
The most popular airline flying from Denver to St Louis are
Can I fly from DEN to STL non-stop?
Yes, you can fly DEN to STL non-stop on
Which airlines fly nonstop between Denver and St Louis?
The non-stop flights between Denver and St Louis are .
What’s the earliest departure time from DEN to STL Airport?
The earliest flight leaves DEN at 5:35 am and lands in STL - Lambert St Louis International
What are the airports in St Louis?
STL
Can I make changes to my Denver to St Louis flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from DEN to STL?
Read the fare rules of the Denver to St Louis air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Denver and St Louis?
operate flights between Denver and St Louis
How long does a flight from Denver to St Louis take?
It takes approximately 2 hour to fly non-stop from DEN to STL, which is 769.57 miles by air.
Which airlines provide the cheapest flights from Denver (DEN) to St Louis (STL) ?
In the past couple of days, the cheapest tickets to STL from DEN were found on WN : USD 230
Do I need a passport to fly between DEN and STL?
No
What’s the latest departure time from DEN to STL ?
The last flight leaves DEN at 8:50 pm
Denver (DEN) to St Louis (STL): Airport Information
| Origin Airport | Denver International , Denver, US |
| Destination Airport | Lambert St Louis International , St Louis, US |
| Distance | 770 miles |
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