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$46+ Cheap flights from St. Louis (STL) to Colorado

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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DEN
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from St. Louis to Colorado

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Colorado (USCO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2024.

Find flight deals from St. Louis to Colorado

Cheapest flights from St. Louis to Colorado
Explore the most affordable flight options available from St. Louis to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This Cheapflightsfares deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/76:46 pmSTL - DEN
Nonstop2h 36mFrontier
Sat 12/145:05 amDEN - STL
Nonstop2h 08mFrontier
Deal found 11/21$67
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/112:25 pmSTL - DEN
1 stop5h 25mDelta
Wed 12/186:29 pmDEN - STL
1 stop5h 36mDelta
Deal found 11/20$216
This United Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/74:31 pmSTL - DEN
Nonstop2h 31mUnited Airlines
Tue 12/101:26 pmDEN - STL
Nonstop2h 03mUnited Airlines
Deal found 11/19$217
This Southwest deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/126:35 amSTL - DEN
Nonstop2h 25mSouthwest
Sun 12/156:10 amDEN - STL
Nonstop2h 10mSouthwest
Deal found 11/20$228
This American Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/85:45 amSTL - DEN
1 stop5h 29mAmerican Airlines
Thu 12/126:00 amDEN - STL
1 stop5h 56mAmerican Airlines
Deal found 11/20$266
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/58:30 amSTL - GJT
1 stop4h 58mUnited Airlines
Mon 12/95:30 amGJT - STL
1 stop6h 13mUnited Airlines
Deal found 11/20$338
This American Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/611:41 amSTL - COS
1 stop7h 15mAmerican Airlines
Tue 12/106:00 amCOS - STL
1 stop5h 56mAmerican Airlines
Deal found 11/19$344
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/211:44 pmSTL - GUC
1 stop7h 26mUnited Airlines
Sat 12/281:40 pmGUC - STL
1 stop6h 11mUnited Airlines
Deal found 11/20$352
This Southwest deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/138:05 pmSTL - COS
1 stop4h 05mSouthwest
Sun 12/153:50 pmCOS - STL
1 stop6h 20mSouthwest
Deal found 11/20$359
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/234:43 pmSTL - COS
1 stop4h 16mUnited Airlines
Fri 12/275:10 pmCOS - STL
1 stop4h 06mUnited Airlines
Deal found 11/20$366
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/66:00 amSTL - COS
1 stop7h 46mDelta
Tue 12/101:44 pmCOS - STL
1 stop5h 59mDelta
Deal found 11/20$386
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/54:31 pmSTL - ASE
1 stop5h 58mUnited Airlines
Mon 12/93:30 pmASE - STL
1 stop4h 11mUnited Airlines
Deal found 11/20$398

Find flights from St. Louis to Colorado within your budget

Customize your flight search to find flights from St. Louis to Colorado 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, Cheapflights users made 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 12/11

6:46 pm-8:22 pm

Nonstop2h 36m

Denver Intl

Wed 12/18

5:05 am-8:13 am

Nonstop2h 08m

$68

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 1/15

8:27 am-10:05 am

Nonstop2h 38m

Denver Intl

Sun 1/19

9:40 am-12:48 pm

Nonstop2h 08m

$177

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Thu 1/9

7:20 am-8:55 am

Nonstop2h 35m

Denver Intl

Mon 1/13

7:20 pm-10:20 pm

Nonstop2h 00m

$198

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Thu 1/9

7:40 am-3:20 pm

1 stop8h 40m

Denver Intl

Mon 1/13

5:40 am-1:18 pm

1 stop6h 38m

$216

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Thu 2/27

3:21 pm-11:49 pm

1 stop9h 28m

Denver Intl

Mon 3/3

6:00 am-9:16 am

Nonstop2h 16m

$230

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Fri 2/14

5:27 pm-11:57 pm

1 stop7h 30m

Denver Intl

Tue 2/18

8:06 am-2:52 pm

1 stop5h 46m

$262

St. LouisDurango

STL - DRO

STLDRO

Lambert-St Louis

Fri 1/3

1:45 pm-8:34 pm

1 stop7h 49m

Durango La Plata County

Wed 1/8

3:33 pm-11:57 pm

1 stop7h 24m

$298

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Mon 1/6

5:21 am-10:12 am

1 stop5h 51m

Colorado Springs

Wed 1/8

6:00 am-1:00 pm

1 stop6h 00m

$302

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Mon 1/13

6:30 am-11:34 am

1 stop6h 04m

Colorado Springs

Sat 1/18

6:00 am-2:14 pm

2 stops7h 14m

$307

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Wed 4/9

6:00 am-12:50 pm

1 stop7h 50m

Colorado Springs

Tue 4/22

6:00 am-2:35 pm

1 stop7h 35m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 44 results
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Best time to book a flight from St. Louis to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from St. Louis 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.

Travel insights for flights from St. Louis to Colorado

Get recent, data-driven insights about flights from St. Louis to Colorado including ideal travel times, pricing trends, and more.

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

Currently, October is the cheapest month in which you can book a flight from St. Louis to Colorado (average of $197). Flying from St. Louis to Colorado in March is currently the most expensive (average of $270). 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.

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

Find hourly flight availability from St. Louis to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

When flying from St. Louis to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from St. Louis to Colorado

Explore weekly flight availability from St. Louis to Colorado. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 21, 2024.

The most flights from STL to USCO are scheduled on a Monday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in Colorado by month

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

In terms of precipitation, rainfall in Colorado ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Colorado when rainfall is around 0.5 in.

Temperature in Colorado by month

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

If weather is an important factor for your trip to Colorado, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Colorado. Reviews last updated November 21, 2024.
Read through reviews of airlines operating flights from St. Louis to Colorado, such as Frontier, United Airlines and Southwest. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.

Alaska Airlines
8.0
Very good
9,458 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.

Delta
8.0
Very good
8,759 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.

United Airlines
7.4
Good
9,173 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.

Related info for your journey

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

  • What airport do you fly from for flights from St. Louis to Colorado?

    For a flight from St. Louis to Colorado, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

  • How popular is this St. Louis to Colorado flight route?

    This flight path from Lambert-St Louis to Colorado was viewed by 219 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $46. Users have also found prices from $79 and $98 on United Airlines and Delta, respectively.

  • What are the most popular routes from St. Louis to Colorado?

    When deciding which route to take from St. Louis to Colorado consider Lambert-St Louis - Denver Intl, Lambert-St Louis - Colorado Springs or Lambert-St Louis - Vail Eagle County as they are the most popular.

  • What are the most reliable airlines from St. Louis to Colorado?

    The top 3 most reliable airlines when flying from St. Louis to Colorado are Air Canada (87%), Frontier (85%) and United Airlines (83%).

  • What are the cheapest flights from St. Louis to Colorado?

    The cheapest flight price from St. Louis to Colorado is $50. On average you can expect to pay $873. The most popular route, (Lambert-St Louis - Denver Intl), can usually be booked for $103.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Colorado 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 St. Louis to Colorado?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Colorado (average of $197). Flying from St. Louis to Colorado in March is currently the most expensive (average of $270). 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

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Alternative routes for St. Louis to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Kansas City to Ontario flights

Top 5 airlines flying from St. Louis to Colorado

Discover the top 5 airlines that operate flights from St. Louis to Colorado. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$45Average$118FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$151Average$518FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$158Average$311FlexibilityNo cancel feeOn-time63%
DeltaCheapest$175Average$291FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$192Average$440FlexibilityNo cancel feeOn-time71%
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