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 $185 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $269 and $275 round-trip. Southwest is currently priced 51% 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 Southwest. According to our data, you can fly for as low as $164. Users have also found prices from $184 and $354 on Delta and American Airlines, 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.

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 176% on this flight, we recommend booking at least 59 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 $159 1-2 weeks out and tickets from $276 for flights departing within the next 72 hours.

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

July is one of the best times of the year to fly to St. Louis from Colorado Springs. Prices for July average $207 per person but you can even find prices for as low as $41. The most expensive prices can be found in the month of March. Opting for a July flight can save you 31% on your journey compared to booking in March

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.

$164+ Flights from Colorado Springs to St. Louis

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Cheap flight deals from Colorado Springs to St. Louis

Round-trip from	$185 (Southwest)
One-way from	$164 (Southwest)
Popular in	July
Cheapest in	October
Average price	$389

From Colorado Springs to Lambert-St Louis

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

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($24 potential increase over avg. RT price).

Search Deals

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 June 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 June 8, 2025.

Mon 8/113:00 pmCOS - STL

1 stop7h 25mSouthwest

Sat 8/165:45 amSTL - COS

1 stop5h 35mSouthwest

Deal found 6/6

$185

Mon 8/115:24 pmCOS - STL

1 stop4h 50mAmerican Airlines

Sat 8/165:15 amSTL - COS

1 stop5h 46mAmerican Airlines

Deal found 6/7

$269

Mon 8/115:55 pmCOS - STL

1 stop5h 43mDelta

Sat 8/166:00 amSTL - COS

1 stop5h 16mDelta

Deal found 6/7

$275

Sat 7/57:30 amCOS - STL

1 stop4h 16mUnited Airlines

Sat 7/125:15 amSTL - COS

1 stop4h 51mUnited Airlines

Deal found 6/7

$332

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 June 8, 2025.

Mon 8/113:00 pmCOS - STL

1 stop7h 25mSouthwest

Sat 8/165:45 amSTL - COS

1 stop5h 35mSouthwest

Deal found 6/6

$185

Mon 8/115:24 pmCOS - STL

1 stop4h 50mAmerican Airlines

Sat 8/165:15 amSTL - COS

1 stop5h 46mAmerican Airlines

Deal found 6/7

$269

Mon 8/115:55 pmCOS - STL

1 stop5h 43mDelta

Sat 8/166:00 amSTL - COS

1 stop5h 16mDelta

Deal found 6/7

$275

Sat 7/57:30 amCOS - STL

1 stop4h 16mUnited Airlines

Sat 7/125:15 amSTL - COS

1 stop4h 51mUnited Airlines

Deal found 6/7

$332

Last-minute flights from Colorado Springs to St. Louis
Discover last-minute flight deals from Colorado Springs to St. Louis. Data last updated June 8, 2025 and is based on user searches.

Sat 6/145:01 pmCOS - STL

1 stop5h 18mAmerican Airlines

Sat 6/215:37 amSTL - COS

1 stop5h 23mAmerican Airlines

Deal found 6/7

$493

Sun 6/156:00 amCOS - STL

1 stop5h 20mUnited Airlines

Fri 6/209:10 amSTL - COS

1 stop4h 06mUnited Airlines

Deal found 6/7

$487

Mon 6/162:28 pmCOS - STL

1 stop6h 06mDelta

Sat 6/216:30 amSTL - COS

1 stop4h 32mDelta

Deal found 6/6

$437

Wed 6/184:45 pmCOS - STL

1 stop6h 10mSouthwest

Sun 6/222:20 pmSTL - COS

1 stop10h 10mSouthwest

Deal found 6/6

$488

Fri 6/275:01 pmCOS - STL

1 stop5h 18mAmerican Airlines

Mon 6/305:37 amSTL - COS

1 stop5h 23mAmerican Airlines

Deal found 6/8

$327

Mon 6/306:05 pmCOS - STL

1 stop5h 30mSouthwest

Sat 7/55:50 amSTL - COS

1 stop4h 40mSouthwest

Deal found 6/8

$302

Sat 7/57:30 amCOS - STL

1 stop4h 16mUnited Airlines

Sat 7/125:15 amSTL - COS

1 stop4h 51mUnited Airlines

Deal found 6/7

$332

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 June 8, 2025.

Sun 8/37:00 pmCOS - STL

1 stop5h 05mSouthwest

Deal found 6/8

$164

Sun 8/35:55 pmCOS - STL

1 stop5h 43mDelta

Deal found 6/7

$184

Fri 6/1310:52 amCOS - STL

1 stop6h 39mAmerican Airlines

Deal found 6/8

$354

Fri 6/135:30 amCOS - STL

2 stops9h 00mUnited Airlines

Deal found 6/8

$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

Mon 8/11

3:00 pm-11:25 pm

1 stop7h 25m

Lambert-St Louis

Sat 8/16

5:45 am-10:20 am

1 stop5h 35m

$185

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Mon 8/11

5:24 pm-11:14 pm

1 stop4h 50m

Lambert-St Louis

Sat 8/16

5:15 am-10:01 am

1 stop5h 46m

$269

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Mon 8/11

5:55 pm-12:38 am

1 stop5h 43m

Lambert-St Louis

Sat 8/16

6:00 am-10:16 am

1 stop5h 16m

$275

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Sat 7/5

7:30 am-12:46 pm

1 stop4h 16m

Lambert-St Louis

Sat 7/12

5:15 am-9:06 am

1 stop4h 51m

$332

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Sun 8/3

7:00 pm-1:05 am

1 stop5h 05m

$164

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Sun 8/3

5:55 pm-12:38 am

1 stop5h 43m

$184

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Fri 6/13

10:52 am-6:31 pm

1 stop6h 39m

$354

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Fri 6/13

5:30 am-3:30 pm

2 stops9h 00m

$359

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/8

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.

Rainfall in St. Louis by month

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.

Temperature in St. Louis by month

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).

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Colorado Springs to St. Louis, such as Southwest, Delta and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,288 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,288 reviews

Southwest

8.0

Very good

4,288 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,949 reviews

Southwest

8.0

Very good

4,288 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,782 reviews

Southwest

8.0

Very good

4,288 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,288 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 $185 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $269 and $275 round-trip. Southwest is currently priced 51% 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 Southwest. According to our data, you can fly for as low as $164. Users have also found prices from $184 and $354 on Delta and American Airlines, 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

Maryland Heights

Fairview Heights

Collinsville

Eureka

St. Peters

Glencoe

Festus

Alton

Farmington

O'Fallon

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Colorado Springs to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$246	Average$306	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$266	Average$387	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$266	Average$359	FlexibilityNo cancel fee	On-time69%

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$164+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Colorado Springs to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Colorado Springs to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 June 8, 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 June 8, 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?

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Colorado Springs to St. Louis, such as Southwest, Delta and United Airlines. Users have also rated airlines in terms of 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 Colorado Springs?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Colorado Springs to St. Louis

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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 June 8, 2025.