What are the cheapest airlines flying from Colorado Springs to St. Louis round-trip?

Our cheapest airline available from Colorado Springs to St. Louis is Southwest. Our recent data shows that you can find tickets from as low as $234 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $252 and $265 round-trip. Southwest is currently priced 36% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Colorado Springs to St. Louis one-way?

For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $105. Users have also found prices from $109 and $141 on Delta and Southwest, respectively.

What is the cheapest day to fly from Colorado Springs to St. Louis?

Travelers seeking maximum savings on their Colorado Springs to St. Louis flight should consider departing on Friday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What are the most popular airlines that fly from Colorado Springs to St. Louis?

American Airlines, United Airlines and Southwest are the most popular airlines when flying from Colorado Springs to St. Louis.

What is the cheapest day to fly round-trip from Colorado Springs to St. Louis?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 77% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Colorado Springs to St. Louis?

To save up to 120% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Colorado Springs to St. Louis from $168 1-2 weeks out and tickets from $280 for flights departing within the next 72 hours.

What is the cheapest month to fly from Colorado Springs to St. Louis?

January is one of the best times of the year to fly to St. Louis from Colorado Springs. Prices for January average $224 per person but you can even find prices for as low as $44. The most expensive prices can be found in the month of June. Opting for a January flight can save you 33% on your journey compared to booking in June

What is the cheapest time of day to fly from COS to STL?

It’s typically best to fly out from Colorado Springs to St. Louis in the morning. Doing so could potentially save you 18% on the flight price compared to flying in the afternoon, which is usually more expensive.

Can I find deals for flights from Colorado Springs to St. Louis that include hotel bookings?

Yes. In addition to deals on Colorado Springs to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Colorado Springs to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado Springs to St. Louis.

Can I find deals for business class flights from Colorado Springs to St. Louis?

Yes. Cheapflights offers flight deals from Colorado Springs to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$105+ Flights from Colorado Springs to St. Louis

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Cheap flight deals from Colorado Springs to St. Louis

Round-trip from	$213 (American Airlines)
One-way from	$105 (American Airlines)
Popular in	March
Cheapest in	October
Average price	$360

From Colorado Springs to Lambert-St Louis

Search Deals

One-way flight from Colorado Springs to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Find flight deals from Colorado Springs to St. Louis

Cheapest flights from Colorado Springs to St. Louis
Explore the most affordable flight options available from Colorado Springs to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Wed 10/15:16 pmCOS - STL

1 stop4h 34mAmerican Airlines

Sat 10/45:18 amSTL - COS

1 stop5h 53mAmerican Airlines

Deal found 8/13

$213

Sat 9/66:00 amCOS - STL

1 stop7h 28mDelta

Mon 9/153:36 pmSTL - COS

1 stop6h 03mDelta

Deal found 8/13

$217

Thu 9/115:03 pmCOS - STL

1 stop4h 20mAmerican Airlines

Sun 9/146:05 amSTL - COS

1 stop6h 28mAmerican Airlines

Deal found 8/13

$249

Thu 9/1110:35 amCOS - STL

2 stops7h 00mSouthwest

Sun 9/146:00 amSTL - COS

1 stop5h 55mSouthwest

Deal found 8/13

$264

Mon 10/205:49 pmCOS - STL

1 stop5h 35mDelta

Fri 10/242:29 pmSTL - COS

1 stop8h 41mDelta

Deal found 8/14

$268

Thu 9/1812:02 pmCOS - STL

1 stop5h 21mUnited Airlines

Mon 9/225:30 pmSTL - COS

2 stops7h 20mUnited Airlines

Deal found 8/13

$292

Sat 9/66:00 amCOS - STL

2 stops7h 19mUnited Airlines

Mon 9/155:30 pmSTL - COS

2 stops7h 20mUnited Airlines

Deal found 8/13

$297

Wed 10/15:55 pmCOS - STL

2 stops13h 19mDelta

Sat 10/412:15 pmSTL - COS

2 stops10h 56mDelta

Deal found 8/13

$302

Sat 9/1310:30 amCOS - STL

1 stop5h 03mUnited Airlines

Mon 9/155:30 pmSTL - COS

2 stops7h 20mUnited Airlines

Deal found 8/12

$324

Best flights from Colorado Springs to St. Louis
Discover carefully curated flight deals from Colorado Springs to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2025.

Wed 10/15:16 pmCOS - STL

1 stop4h 34mAmerican Airlines

Sat 10/45:18 amSTL - COS

1 stop5h 53mAmerican Airlines

Deal found 8/13

$213

Sat 10/256:00 amCOS - STL

1 stop5h 35mDelta

Sun 10/261:30 pmSTL - COS

1 stop8h 00mDelta

Deal found 8/12

$217

Tue 9/236:00 amCOS - STL

2 stops10h 40mSouthwest

Fri 9/265:30 amSTL - COS

1 stop9h 45mSouthwest

Deal found 8/13

$264

Thu 9/185:55 pmCOS - STL

1 stop5h 43mDelta

Mon 9/221:26 pmSTL - COS

1 stop8h 13mDelta

Deal found 8/12

$217

Sat 9/65:16 pmCOS - STL

1 stop4h 34mAmerican Airlines

Mon 9/155:18 amSTL - COS

1 stop5h 53mAmerican Airlines

Deal found 8/13

$217

Thu 10/95:49 pmCOS - STL

1 stop5h 35mDelta

Mon 10/136:00 amSTL - COS

1 stop7h 11mDelta

Deal found 8/13

$217

Sat 9/135:16 pmCOS - STL

1 stop4h 34mAmerican Airlines

Mon 9/155:18 amSTL - COS

1 stop5h 53mAmerican Airlines

Deal found 8/12

$217

Sat 9/66:00 amCOS - STL

1 stop7h 28mDelta

Mon 9/153:36 pmSTL - COS

1 stop6h 03mDelta

Deal found 8/13

$217

Sat 10/2510:30 amCOS - STL

2 stops9h 05mSouthwest

Sun 10/267:30 amSTL - COS

1 stop5h 35mSouthwest

Deal found 8/12

$264

Wed 10/16:00 amCOS - STL

1 stop5h 21mDelta

Sat 10/412:15 pmSTL - COS

2 stops10h 56mDelta

Deal found 8/13

$222

Thu 9/115:03 pmCOS - STL

1 stop4h 20mAmerican Airlines

Sun 9/146:05 amSTL - COS

1 stop6h 28mAmerican Airlines

Deal found 8/13

$249

Last-minute flights from Colorado Springs to St. Louis
Discover last-minute flight deals from Colorado Springs to St. Louis. Data last updated August 14, 2025 and is based on user searches.

Sun 8/246:30 amCOS - STL

1 stop5h 45mSouthwest

Sun 8/246:05 pmSTL - COS

1 stop7h 00mSouthwest

Deal found 8/13

$487

Sun 8/245:30 amCOS - STL

2 stops8h 03mUnited Airlines

Sun 8/245:30 pmSTL - COS

2 stops7h 20mUnited Airlines

Deal found 8/13

$677

Thu 8/285:55 pmCOS - STL

1 stop5h 43mDelta

Sun 8/311:26 pmSTL - COS

1 stop8h 15mDelta

Deal found 8/14

$387

Tue 9/26:25 pmCOS - STL

1 stop4h 28mUnited Airlines

Thu 9/115:15 amSTL - COS

1 stop4h 49mUnited Airlines

Deal found 8/14

$372

Sat 9/66:00 amCOS - STL

1 stop7h 28mDelta

Mon 9/153:36 pmSTL - COS

1 stop6h 03mDelta

Deal found 8/13

$217

Sat 9/66:00 amCOS - STL

2 stops7h 19mUnited Airlines

Mon 9/155:30 pmSTL - COS

2 stops7h 20mUnited Airlines

Deal found 8/13

$297

Thu 9/115:03 pmCOS - STL

1 stop4h 20mAmerican Airlines

Sun 9/146:05 amSTL - COS

1 stop6h 28mAmerican Airlines

Deal found 8/13

$249

Thu 9/1110:35 amCOS - STL

2 stops7h 00mSouthwest

Sun 9/146:00 amSTL - COS

1 stop5h 55mSouthwest

Deal found 8/13

$264

Sat 9/1310:30 amCOS - STL

1 stop5h 03mUnited Airlines

Mon 9/155:30 pmSTL - COS

2 stops7h 20mUnited Airlines

Deal found 8/12

$324

Thu 9/185:55 pmCOS - STL

1 stop5h 43mDelta

Mon 9/226:01 amSTL - COS

1 stop7h 05mDelta

Deal found 8/13

$268

Thu 9/1812:02 pmCOS - STL

1 stop5h 21mUnited Airlines

Mon 9/225:30 pmSTL - COS

2 stops7h 20mUnited Airlines

Deal found 8/13

$292

One-way flights from Colorado Springs to St. Louis
Search for one-way flight options from Colorado Springs to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 14, 2025.

Tue 9/95:16 pmCOS - STL

1 stop4h 34mAmerican Airlines

Deal found 8/14

$105

Thu 9/411:11 amCOS - STL

1 stop4h 34mDelta

Deal found 8/14

$109

Sun 9/145:40 amCOS - STL

1 stop3h 50mSouthwest

Deal found 8/14

$141

Tue 9/95:30 amCOS - STL

2 stops7h 49mUnited Airlines

Deal found 8/14

$145

Thu 9/45:30 amCOS - STL

2 stops9h 14mUnited Airlines

Deal found 8/14

$149

Sun 9/216:50 pmCOS - STL

1 stop5h 25mSouthwest

Deal found 8/14

$164

Sun 8/241:59 pmCOS - STL

1 stop5h 24mAmerican Airlines

Deal found 8/13

$244

Sun 8/245:30 amCOS - STL

2 stops8h 03mUnited Airlines

Deal found 8/13

$324

Thu 9/185:30 amCOS - STL

2 stops11h 53mUnited Airlines

Deal found 8/13

$359

Cheapflights Fare Finder

Use the filters below to find and compare flights from Colorado Springs to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Wed 10/1

5:16 pm-10:50 pm

1 stop4h 34m

Lambert-St Louis

Sat 10/4

5:18 am-10:11 am

1 stop5h 53m

$213

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Sat 10/25

6:00 am-12:35 pm

1 stop5h 35m

Lambert-St Louis

Sun 10/26

1:30 pm-8:30 pm

1 stop8h 00m

$217

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 9/18

5:55 pm-12:38 am

1 stop5h 43m

Lambert-St Louis

Mon 9/22

1:26 pm-8:39 pm

1 stop8h 13m

$217

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Sat 9/6

5:16 pm-10:50 pm

1 stop4h 34m

Lambert-St Louis

Mon 9/15

5:18 am-10:11 am

1 stop5h 53m

$217

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 10/9

5:49 pm-12:24 am

1 stop5h 35m

Lambert-St Louis

Mon 10/13

6:00 am-12:11 pm

1 stop7h 11m

$217

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Sat 9/13

5:16 pm-10:50 pm

1 stop4h 34m

Lambert-St Louis

Mon 9/15

5:18 am-10:11 am

1 stop5h 53m

$217

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Sat 9/6

6:00 am-2:28 pm

1 stop7h 28m

Lambert-St Louis

Mon 9/15

3:36 pm-8:39 pm

1 stop6h 03m

$217

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Wed 10/1

6:00 am-12:21 pm

1 stop5h 21m

Lambert-St Louis

Sat 10/4

12:15 pm-10:11 pm

2 stops10h 56m

$222

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 9/11

5:03 pm-10:23 pm

1 stop4h 20m

Lambert-St Louis

Sun 9/14

6:05 am-11:33 am

1 stop6h 28m

$249

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Tue 9/23

6:00 am-5:40 pm

2 stops10h 40m

Lambert-St Louis

Fri 9/26

5:30 am-2:15 pm

1 stop9h 45m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 20 results

Best time to book a flight from Colorado Springs to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Colorado Springs with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado Springs to St. Louis

What is the cheapest month to book a flight from Colorado Springs to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Colorado Springs to St. Louis (average of $311). Flying from Colorado Springs to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Colorado Springs to St. Louis, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,244 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

8,916 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

What are the cheapest airlines flying from Colorado Springs to St. Louis round-trip?
Our cheapest airline available from Colorado Springs to St. Louis is Southwest. Our recent data shows that you can find tickets from as low as $234 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $252 and $265 round-trip. Southwest is currently priced 36% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Colorado Springs to St. Louis one-way?
For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $105. Users have also found prices from $109 and $141 on Delta and Southwest, respectively.
Can I find deals for flights from Colorado Springs to St. Louis that include hotel bookings?
Yes. In addition to deals on Colorado Springs to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Colorado Springs to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado Springs to St. Louis.
Can I find deals for business class flights from Colorado Springs to St. Louis?
Yes. Cheapflights offers flight deals from Colorado Springs to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Colorado Springs to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Colorado Springs to St. Louis (average of $311). Flying from Colorado Springs to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

O'Fallon

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Eureka

St. Peters

Glencoe

Alton

Chesterfield

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Festus

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Top 3 airlines flying from Colorado Springs to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$234	Average$362	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$252	Average$306	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$265	Average$336	FlexibilityNo cancel fee	On-time69%

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$105+ Cheap flights from Colorado Springs to St. Louis (COS - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Colorado Springs to St. Louis

Round-trip from

One-way from

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Find flight deals from Colorado Springs to St. Louis

Cheapest flights from Colorado Springs to St. LouisExplore the most affordable flight options available from Colorado Springs to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Explore the most affordable flight options available from Colorado Springs to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Colorado Springs to St. Louis that are best for you.

Best time to book a flight from Colorado Springs to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Colorado Springs with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Colorado Springs to St. Louis

What is the cheapest month to book a flight from Colorado Springs to St. Louis?

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Colorado Springs to St. Louis, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Colorado Springs to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Colorado Springs to St. Louis round-trip?

What are the cheapest airlines to fly from Colorado Springs to St. Louis one-way?

Can I find deals for flights from Colorado Springs to St. Louis that include hotel bookings?

How can I find direct flights from Colorado Springs to St. Louis?

Can I find deals for business class flights from Colorado Springs to St. Louis?

What is the cheapest month to book a flight from Colorado Springs to St. Louis?

Traveling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Colorado Springs to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Colorado Springs to St. Louis

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Cheapest flights from Colorado Springs to St. Louis
Explore the most affordable flight options available from Colorado Springs to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.