Cheap Flight Tickets from St Louis (STL) to Denver (DEN), Starting at $350

Good to Know: Cheapest and Fastest STL - DEN Flights

Useful information for finding best airline tickets from Lambert St Louis International to Denver International on your next trip.

Cheapest Round Trip Flight

$350

F9 Frontier Airlines • 1 stop • 10h 57m

Jul 13 – Jul 20

The cheapest round trip flight from St Louis to Denver (STL-DEN-STL) is currently $350

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Cheapest Direct Flight

$542

F9 Frontier Airlines • nonstop • 3h 56m

Jul 13

The cheapest nonstop flight from St Louis to Denver (STL-DEN) is currently $542

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Fastest Flight

3h 30m

The fastest nonstop flight from St Louis to Denver (STL-DEN) takes 3h 30m

Top Airlines Flying from St Louis to Denver

Southwest Airlines-WN

Southwest Airlines

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

American Airlines, AA

American Airlines

Alaska Airlines -AS

Alaska Airlines

Aeromexico Airline (AM)

Aeromexico

Latest Flight Deals from St Louis (STL) to Denver (DEN)

Compare and book low fare round-trip air tickets from St Louis to Denver. Ideal for travelers with confirmed return itineraries.

Jul 13 - Jul 20, Economy
F9
St Louis → Denver
10h 57m
4:09 PM - 11:00 PM • 1 stop
F9
St Louis → Denver
8h 52m
10:00 AM - 6:15 PM • 1 stop
$350
Frontier Airlines
Jul 13 - Jul 20, Economy
F9
St Louis → Denver
24h 15m
7:10 PM - 3:48 AM • 1 stop
F9
St Louis → Denver
11h 55m
4:10 PM - 7:23 PM • nonstop
$576
Frontier Airlines
Jul 13 - Jul 20, Economy
WN
St Louis → Denver
22h 20m
7:20 PM - 8:00 AM • 1 stop
WN
St Louis → Denver
3h 30m
11:40 AM - 2:50 PM • nonstop
$832
Southwest Airlines
Jul 13 - Jul 20, Economy
WN
St Louis → Denver
20h 40m
9:45 PM - 9:25 AM • 1 stop
WN
St Louis → Denver
3h 25m
7:20 AM - 10:25 AM • nonstop
$832
Southwest Airlines
Jul 13 - Jul 20, Economy
WN
St Louis → Denver
5h 45m
12:40 PM - 4:10 PM • 1 stop
WN
St Louis → Denver
6h 50m
5:00 AM - 1:35 PM • 1 stop
$843
Southwest Airlines
Jul 13 - Jul 20, Economy
WN
St Louis → Denver
10h 20m
12:40 PM - 6:00 PM • 1 stop
WN
St Louis → Denver
3h 30m
8:45 PM - 11:55 PM • nonstop
$882
Southwest Airlines

Fly from St Louis to Denver with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from St Louis to Denver? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on St Louis to Denver Flights

What are the airports in St Louis?
STL
What’s the most popular airline flying from STL to DEN?
The most popular airline flying from St Louis to Denver are
Can I fly from STL to DEN non-stop?
Yes, you can fly STL to DEN non-stop on
Which airlines fly nonstop between St Louis and Denver?
The non-stop flights between St Louis and Denver are .
What’s the earliest departure time from STL to DEN Airport?
The earliest flight leaves STL at 11:30 am and lands in DEN - Denver International
What are the airports in Denver?
DEN
Can I make changes to my St Louis to Denver 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 STL to DEN?
Read the fare rules of the St Louis to Denver 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 St Louis and Denver?
operate flights between St Louis and Denver
How long does a flight from St Louis to Denver take?
It takes approximately 2 hour to fly non-stop from STL to DEN, which is 769.57 miles by air.
Which airlines provide the cheapest flights from St Louis (STL) to Denver (DEN) ?
In the past couple of days, the cheapest tickets to DEN from STL were found on F9 : USD 350
Do I need a passport to fly between STL and DEN?
No
What’s the latest departure time from STL to DEN ?
The last flight leaves STL at 9:45 pm

St Louis (STL) to Denver (DEN): Airport Information

Origin Airport Lambert St Louis International , St Louis, US
Destination Airport Denver International , Denver, US
Distance 770 miles

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