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Cheap Flights from St Louis to Denver, CO, United States - STL to DEN Last modified: May 24, 2016 1:47 PM

Popular flights from St Louis to Denver Last modified: May 24, 2016 1:47 PM

We’ve got the inside scoop on finding the best time to fly for the best price. Not sure when to travel for your next vacation? Find details below on when-to-fly and when-to-buy.

Alaska Airlines
Departure Date Return Date Lowest Price
Aug 25, 2016 Aug 28, 2016 $483
American Airlines
Departure Date Return Date Lowest Price
Aug 27, 2016 Aug 29, 2016 $190
Aug 31, 2016 Sep 7, 2016 $190
Sep 17, 2016 Sep 21, 2016 $190
Frontier Airlines
Departure Date Return Date Lowest Price
Jun 7, 2016 Jun 11, 2016 $128
Jun 8, 2016 Jun 11, 2016 $128
Jun 11, 2016 Jun 14, 2016 $128
Aug 16, 2016 Aug 23, 2016 $128
Aug 17, 2016 Aug 24, 2016 $128
United Airlines
Departure Date Return Date Lowest Price
Aug 25, 2016 Aug 29, 2016 $137
Sep 8, 2016 Sep 12, 2016 $137
Sep 14, 2016 Sep 20, 2016 $137
Sep 21, 2016 Sep 26, 2016 $137

How Much Does it Cost to Fly from St Louis to Denver (STL to DEN)?

We have collected flight cost data from across the web for travel from St Louis to Denver, and have found the average flight price for this trip to be $146.

When Can I Buy the Cheapest Flight from St Louis to Denver (STL to DEN)?

Airlines can adjust prices for plane tickets from St Louis to Denver based on the day and time that you decide to book your flight. We have collected data from all airlines, and have discovered that the best days to book flights are Tuesdays, Wednesdays, and Saturdays. Read our article to find more information about the best time to buy airline tickets.

How far in advance should you book flights from St Louis to Denver

The chart below shows up-to-date information regarding how far in advance a flight from St Louis to Denver should be booked.

Non Stop versus 1-Stop
Advanced PurchaseNon StopOne Stop
< 7 days $565 $402
7-14 days $128 $256
14-21 days $128 $256
21-30 days $155 $269
30-60 days $155 $269
60-90 days $128 $209
90+ days $128 $145

Cheapest Day To Fly from St Louis to Denver

The chart below shows up-to-date information regarding the cheapest days to fly from St Louis to Denver.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$174 $128 $128 $158 $148 $128 $158

Lowest Fares Chart By Month from St Louis to Denver

The chart below shows the lowest fare by month when flying from St Louis to Denver.

Month Origin Destination Carrier Depart Date Return Date Stops Price
May St Louis Denver United 5/28/16 5/31/16 1 $402
June St Louis Denver Frontier 6/7/16 6/11/16 0 $128
July St Louis Denver Frontier 7/12/16 7/19/16 0 $155
August St Louis Denver Frontier 8/16/16 8/23/16 0 $128
September St Louis Denver Frontier 9/14/16 9/20/16 0 $128
October St Louis Denver Frontier 10/1/16 10/5/16 0 $133
November St Louis Denver United 11/24/16 12/1/16 0 $265
December St Louis Denver United 12/3/16 12/10/16 0 $265

Cheapest Weekend Non-Stop Flights for the Next 30 Days from St Louis to Denver

If you're ready to take a trip in the next 30 days and want to fly on the weekend, you might be wondering which weekend is the cheapest to fly. The chart below shows up-to-date data regarding weekend flight prices from St Louis to Denver.

Next 30 Days

SunMonTueWedThuFriSat
22 23 24 25 26 27 28
$568
29 30 31 1 2 3 4
$568 $346
5 6 7 8 9 10 11
$346 $128
12 13 14 15 16 17 18
$128 $174
19 20 21 22 23 24 25
$174 $174
26 27 28 29 30 1 2
$174

Non-Stop vs Connecting Flights from St Louis to Denver (STL to DEN)

Your St Louis to Denver flight can be significantly cheaper by choosing a multi-stop airline ticket. Although these connecting flights sacrifice some convenience, on average, travelers save 20%-60% when they choose to fly multi-stop versus a direct flight.

The average price for connecting flights from St Louis to Denver is $340.

The average price for non-stop flights from St Louis to Denver is $187.

The chart below shows up to date information regarding non-stop flights from St Louis to Denver.

Nonstop Flight Details from St Louis to Denver
CarrierMonTueWedThuFriSatSunEarliest FlightLatest Flight
Frontier 1 1 1 1 1 1 1 16:15 16:15
United 5 5 5 5 5 5 5 08:11 19:55

Round Trip vs One Way Flights from St Louis to Denver (STL to DEN)

We have found that there is often no price difference between buying a round trip flight versus a one way flight. Increased flexibility is the main benefit when it comes to buying a one way flight from St Louis to Denver. However, booking a round trip flight can be a simpler process. You can compare round trip and one way flights by using our flight comparison.

The average price for one way flights from St Louis to Denver is $150.

The average price for round trip flights from St Louis to Denver is $291.

More Cheap Flights

FlightsAirlineLowest Price
Bloomington - Normal to Denver American $330
Springfield to Denver American, Alaska, United $455
Moline to Denver American, United $431
Peoria to Denver American, United $332
Evansville to Denver American, United $329
Champaign to Denver American $376
Springfield to Denver American, United $372
St Louis to Colorado Springs American, Alaska, Frontier, United $280
St Louis to Dallas - Ft Worth American, Alaska, United $203
St Louis to Chicago American, Alaska, United $213
St Louis to Las Vegas American, Alaska, Frontier, United $108
St Louis to Phoenix American, Alaska, Frontier, United $244
St Louis to Los Angeles American, Alaska, Frontier, United $244
St Louis to Atlanta American, Alaska, Frontier, United $88
Springfield to Colorado Springs American, United $385
St Louis to Aspen American, Alaska, United $612
St Louis to Hayden - Steamboat American, Alaska, United $568
Moline to Colorado Springs American, United $520
St Louis to New York American, Alaska, United $244
Evansville to Colorado Springs American, United $503
Peoria to Colorado Springs American, United $420
St Louis to Salt Lake City American, Alaska, Frontier, United $244
St Louis to Vail American, Alaska, United Check Dates
Bloomington - Normal to Colorado Springs American $495
Springfield to Colorado Springs American, United Check Dates
St Louis to Houston American, Alaska, United $270
St Louis to San Francisco American, Alaska, Frontier, United $244
Moline to Dallas - Ft Worth American, United $449
St Louis to Albuquerque American, Alaska, United $348
St Louis to Seattle American, Alaska, Frontier, United $261

Airlines Flying from St Louis to Denver (STL to DEN) Number of flights searched: 175Last modified: May 24, 2016 1:47 PM

Below are the different airlines that fly from St Louis to Denver with the average price of their plane tickets. Just remember that different airlines offer different levels of comfort and service, so consider convenience when choosing your airline.

Below is the full flight schedule summary of the next 30 days for flights from St Louis to Denver.

St Louis to Denver
Airline Connections Mon Tue Wed Thu Fri Sat Sun
American DFW X X X X X X X
Alaska SEA X X X X X X X
Delta DTW X X X X X X X
Frontier - X X X X X X X
United - X X X X X X X
United ORD X X X X X X X
Southwest - X X X X X X X
Southwest TUL X X X X X X X

Airports for Your Route

These pages contain information about the major airports in St Louis and Denver, so you can feel comfortable knowing how to get around whether you are about to take off or you just landed.

St Louis to Denver Flight Questions

Below are some common questions that asked about this flight route:

Question: How long is a direct flight from St Louis to Denver?
Answer: The average St Louis to Denver flight time is 2 hours and 25 minutes.
Question: How many miles are there between St Louis and Denver?
Answer: The distance from St Louis to Denver is 767 miles.
Question: How common are direct flights from St Louis to Denver?
Answer: There are 41 direct flights from St Louis to Denver.
Question: What is the most popular airline for non-stop flights from St Louis to Denver?
Answer: United Airlines provides 82% of the non-stop flights between St Louis and Denver.
Question: What are the most popular connecting cities when flying from St Louis to Denver?
Answer: Chicago, IL
St Louis (STL) To Denver, CO (DEN) Flights: Cheap Flights From St Louis To Denver | FareCompare.