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Cheap flights from St. Louis to Denver from $89

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Denver departing on 2/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Denver

Cheap round-trip flights

Southwest Logo
6:30 pm - 11:20 pmSTL-COS
5h 50m1 stop
Southwest Logo
3:55 pm - 12:10 amCOS-STL
7h 15m1 stop
$177Southwest
Find Deal
Mon, Oct 13 - Mon, Oct 20
Southwest Logo
5:20 pm - 11:00 pmSTL-COS
6h 40m1 stop
Southwest Logo
11:35 am - 8:45 pmCOS-STL
8h 10m2 stops
$182Southwest
Find Deal
Tue, Oct 14 - Tue, Oct 21
Delta Logo
6:00 am - 12:11 pmSTL-COS
7h 11m1 stop
Delta Logo
5:49 pm - 8:16 amCOS-STL
13h 27m2 stops
$222Delta
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Thu, Nov 6 - Sat, Nov 8
American Airlines Logo
7:00 am - 11:48 amSTL-COS
5h 48m1 stop
American Airlines Logo
12:40 pm - 7:27 pmCOS-STL
5h 47m1 stop
$224American Airlines
Find Deal
Thu, Nov 6 - Sat, Nov 8
United Airlines Logo
9:00 am - 2:29 pmSTL-COS
6h 29m1 stop
United Airlines Logo
3:33 pm - 8:57 pmCOS-STL
4h 24m1 stop
$244United Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 8
Delta Logo
2:20 pm - 10:26 pmSTL-COS
9h 06m1 stop
Delta Logo
6:00 pm - 8:25 amCOS-STL
13h 25m2 stops
$249Delta
Find Deal
Fri, Dec 5 - Mon, Dec 8
Delta Logo
11:36 am - 10:10 pmSTL-COS
11h 34m2 stops
Delta Logo
5:49 pm - 8:16 amCOS-STL
13h 27m2 stops
$254Delta
Find Deal
Thu, Nov 6 - Sat, Nov 8
American Airlines Logo
7:01 am - 1:17 pmSTL-COS
7h 16m1 stop
American Airlines Logo
4:54 pm - 11:49 pmCOS-STL
5h 55m1 stop
$258American Airlines
Find Deal
Thu, Oct 23 - Mon, Oct 27
Southwest Logo
6:40 pm - 11:40 pmSTL-COS
6h 00m1 stop
Southwest Logo
7:05 pm - 11:50 pmCOS-STL
3h 45m1 stop
$262Southwest
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Thu, Dec 18 - Sat, Dec 20
United Airlines Logo
5:15 am - 9:05 amSTL-COS
4h 50m1 stop
United Airlines Logo
6:00 am - 12:28 pmCOS-STL
5h 28m1 stop
$292United Airlines
Find Deal
Thu, Oct 9 - Sun, Oct 12

United Airlines flights from St. Louis to Colorado Springs

Our best United Airlines deals on St. Louis to Colorado Springs flight tickets
United Airlines
Dec 5
STL9:00 amLambert-St Louis
6h 29m
1 stop
COS2:29 pmColorado Springs
Dec 8
COS3:33 pmColorado Springs
4h 24m
1 stop
STL8:57 pmLambert-St Louis
$244
Find similar
United Airlines
Oct 9
STL5:15 amLambert-St Louis
4h 50m
1 stop
COS9:05 amColorado Springs
Oct 12
COS6:00 amColorado Springs
5h 28m
1 stop
STL12:28 pmLambert-St Louis
$292
Find similar
United Airlines
Oct 16
STL5:15 amLambert-St Louis
4h 50m
1 stop
COS9:05 amColorado Springs
Oct 20
COS6:20 pmColorado Springs
4h 38m
1 stop
STL11:58 pmLambert-St Louis
$305
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Southwest flights from St. Louis to Colorado Springs

Our best Southwest deals on St. Louis to Colorado Springs flight tickets
Southwest
Oct 13
STL6:30 pmLambert-St Louis
5h 50m
1 stop
COS11:20 pmColorado Springs
Oct 20
COS3:55 pmColorado Springs
7h 15m
1 stop
STL12:10 amLambert-St Louis
$177
Find similar
Southwest
Oct 14
STL5:20 pmLambert-St Louis
6h 40m
1 stop
COS11:00 pmColorado Springs
Oct 21
COS11:35 amColorado Springs
8h 10m
2 stops
STL8:45 pmLambert-St Louis
$182
Find similar
Southwest
Dec 18
STL6:40 pmLambert-St Louis
6h 00m
1 stop
COS11:40 pmColorado Springs
Dec 20
COS7:05 pmColorado Springs
3h 45m
1 stop
STL11:50 pmLambert-St Louis
$262
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Colorado Springs that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from St. Louis to Colorado Springs that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Mon 10/13

6:30 pm-11:20 pm

1 stop5h 50m

Colorado Springs

Mon 10/20

3:55 pm-12:10 am

1 stop7h 15m

$177

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Tue 10/14

5:20 pm-11:00 pm

1 stop6h 40m

Colorado Springs

Tue 10/21

11:35 am-8:45 pm

2 stops8h 10m

$182

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Thu 11/6

6:00 am-12:11 pm

1 stop7h 11m

Colorado Springs

Sat 11/8

5:49 pm-8:16 am

2 stops13h 27m

$222

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Thu 11/6

7:00 am-11:48 am

1 stop5h 48m

Colorado Springs

Sat 11/8

12:40 pm-7:27 pm

1 stop5h 47m

$224

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Fri 12/5

9:00 am-2:29 pm

1 stop6h 29m

Colorado Springs

Mon 12/8

3:33 pm-8:57 pm

1 stop4h 24m

$244

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Fri 12/5

2:20 pm-10:26 pm

1 stop9h 06m

Colorado Springs

Mon 12/8

6:00 pm-8:25 am

2 stops13h 25m

$249

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Thu 11/6

11:36 am-10:10 pm

2 stops11h 34m

Colorado Springs

Sat 11/8

5:49 pm-8:16 am

2 stops13h 27m

$254

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Thu 10/23

7:01 am-1:17 pm

1 stop7h 16m

Colorado Springs

Mon 10/27

4:54 pm-11:49 pm

1 stop5h 55m

$258

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Thu 12/18

6:40 pm-11:40 pm

1 stop6h 00m

Colorado Springs

Sat 12/20

7:05 pm-11:50 pm

1 stop3h 45m

$262

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Thu 10/9

5:15 am-9:05 am

1 stop4h 50m

Colorado Springs

Sun 10/12

6:00 am-12:28 pm

1 stop5h 28m

$292

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Denver from

How to get the cheapest flight ticket from St. Louis to Colorado Springs

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Colorado Springs?

The month of November is another great option to travel to Colorado Springs, with average flight prices from St. Louis averaging around $313.

What is the cheapest day to depart on your flight to Colorado Springs?

The cheapest day to depart from St. Louis to Colorado Springs is on a Wednesday when prices can be found for as low as $346. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Colorado Springs for around $455.

What is the cheapest time of day to depart on your flight to Colorado Springs?

Flying to Colorado Springs from St. Louis at noon is the least expensive time of day to depart. momondo users have found prices as low as $349 when looking at flights departing at noon. Flights to Colorado Springs are more costly in the afternoon, with an average ticket price of $426. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Colorado Springs?

You are more likely to see cheaper flights to Colorado Springs from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Colorado Springs for around $367 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado Springs from St. Louis for as low as $315 on momondo.

How have St. Louis to Colorado Springs flight prices changed over time?

As of September 2025, prices for St. Louis to Colorado Springs flights are approximately 5% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Colorado Springs

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Colorado Springs according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Colorado Springs (STL to COS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Colorado Springs

Direct flights

None
There are no direct flights from St. Louis to Colorado Springs. There are no popular flight routes from St. Louis to Colorado Springs.
Search flight deals

  • How far is Lambert-St Louis to Colorado Springs by plane?

    A flight from Lambert-St Louis to Colorado Springs will travel around 786.9 mi. In terms of flight time, this usually takes a little over 4h 45m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Colorado Springs Airport?

    Prices for flights from Lambert-St Louis Airport to Colorado Springs Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Colorado Springs Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Colorado Springs Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Colorado Springs Airport.

  • What documentation or ID do you need to fly to Colorado Springs Airport?

    The travel and health documents required for your trip to Colorado Springs Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Colorado Springs Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Colorado Springs?

Best airlines flying from St. Louis to Colorado Springs

Compare and see reviews for airlines that fly from St. Louis to Colorado Springs with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $254Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
DeltaPriceFrom $271Free CancellationRating
7.9
7,961 reviews
Search Delta flights
SouthwestPriceFrom $281Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Cañon City

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Colorado Springs?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Colorado Springs for you.

Can I find flights from St. Louis to Colorado Springs with flexible booking policies on momondo?

Flights from St. Louis to Colorado Springs with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Colorado Springs?

momondo provides multiple filters to help you find the best flight to Colorado Springs from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to Colorado Springs right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Colorado Springs from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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