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$43+ 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 2/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DEN
Jan 3 — Jan 101
Fri 1/3
Fri 1/10
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 December 29, 2024.

Round-trip from

$68
(Frontier)

One-way from

$43
(Cheapflightsfares)
From Lambert-St Louis to Colorado
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One-way flight from Lambert-St Louis to Colorado
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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 December 29, 2024.

This Kiwi.com deal was found by Cheapflights users on 12/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/309:29 pmSTL - DEN
1 stop7h 25mFrontier
Wed 1/86:00 amDEN - STL
Nonstop2h 06mFrontier
Deal found 12/28$240
This Southwest deal was found by Cheapflights users on 12/28. 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.
Tue 12/318:20 pmSTL - DEN
Nonstop2h 30mSouthwest
Sat 1/117:10 amDEN - STL
Nonstop2h 10mSouthwest
Deal found 12/28$528
This United Airlines deal was found by Cheapflights users on 12/28. 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 12/308:35 amSTL - GJT
1 stop4h 48mUnited Airlines
Sat 1/47:00 amGJT - STL
1 stop4h 48mUnited Airlines
Deal found 12/28$535
This United Airlines deal was found by Cheapflights users on 12/28. 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 12/301:44 pmSTL - DEN
Nonstop2h 30mUnited Airlines
Tue 1/79:40 amDEN - STL
Nonstop2h 08mUnited Airlines
Deal found 12/28$557
This American Airlines deal was found by Cheapflights users on 12/27. 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.
Mon 12/301:45 pmSTL - DRO
1 stop7h 49mAmerican Airlines
Thu 1/24:36 pmDRO - STL
1 stop4h 45mAmerican Airlines
Deal found 12/27$604
This Delta deal was found by Cheapflights users on 12/28. 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.
Mon 12/303:24 pmSTL - DEN
1 stop7h 21mDelta
Tue 1/74:15 pmDEN - STL
1 stop5h 59mDelta
Deal found 12/28$611
This American Airlines deal was found by Cheapflights users on 12/27. 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.
Mon 12/305:21 amSTL - COS
1 stop5h 51mAmerican Airlines
Mon 3/34:50 pmCOS - STL
1 stop4h 53mAmerican Airlines
Deal found 12/27$616
This eDestinos deal was found by Cheapflights users on 12/27. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/309:29 pmSTL - DEN
1 stop7h 25mMultiple Airlines
Wed 1/15:05 amDEN - STL
3 stops33h 16mMultiple Airlines
Deal found 12/27$616
This Delta deal was found by Cheapflights users on 12/27. 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.
Mon 12/306:00 amSTL - COS
1 stop7h 49mDelta
Sat 2/18:20 amCOS - STL
2 stops13h 54mDelta
Deal found 12/27$621
This Southwest deal was found by Cheapflights users on 12/28. 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.
Sun 12/295:35 pmSTL - COS
1 stop7h 05mSouthwest
Sun 1/53:35 pmCOS - STL
1 stop7h 15mSouthwest
Deal found 12/28$696
This American Airlines deal was found by Cheapflights users on 12/28. 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 12/296:23 pmSTL - DEN
1 stop5h 44mAmerican Airlines
Sun 1/56:00 amDEN - STL
1 stop6h 03mAmerican Airlines
Deal found 12/28$696
This American Airlines deal was found by Cheapflights users on 12/28. 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.
Mon 12/305:21 amSTL - GJT
2 stops10h 39mAmerican Airlines
Sat 1/43:30 pmGJT - STL
1 stop7h 36mAmerican Airlines
Deal found 12/28$701

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 2,558,603 searches. Data last updated December 29, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisVail

STL - EGE

STLEGE

Lambert-St Louis

Sat 1/11

6:46 pm-2:38 pm

1 stop20h 52m

Vail Eagle County

Sun 1/19

3:28 pm-9:16 am

1 stop16h 48m

$68

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 1/15

6:46 pm-8:22 pm

Nonstop2h 36m

Denver Intl

Tue 1/21

12:50 am-11:31 pm

1 stop21h 41m

$77

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Tue 1/28

7:20 am-8:55 am

Nonstop2h 35m

Denver Intl

Tue 2/4

9:50 am-12:55 pm

Nonstop2h 05m

$158

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 1/29

10:22 am-5:03 pm

1 stop7h 41m

Denver Intl

Wed 2/5

5:40 am-1:43 pm

1 stop7h 03m

$196

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Tue 1/14

1:45 pm-3:15 pm

Nonstop2h 30m

Denver Intl

Tue 1/21

5:37 pm-8:43 pm

Nonstop2h 06m

$197

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Fri 4/18

6:51 pm-8:22 pm

Nonstop2h 31m

Denver Intl

Wed 4/23

12:21 pm-11:59 pm

1 stop10h 38m

$250

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Mon 2/3

7:00 am-1:51 pm

1 stop7h 51m

Denver Intl

Mon 2/3

4:00 pm-10:09 pm

1 stop5h 09m

$281

St. LouisDurango

STL - DRO

STLDRO

Lambert-St Louis

Fri 1/24

2:27 pm-9:36 pm

1 stop8h 09m

Durango La Plata County

Mon 2/3

5:27 am-1:00 pm

1 stop6h 33m

$298

St. LouisGrand Junction

STL - GJT

STLGJT

Lambert-St Louis

Wed 1/22

6:44 am-2:49 pm

1 stop9h 05m

Grand Junction Regnl

Sun 1/26

6:00 am-1:00 pm

1 stop6h 00m

$308

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Wed 2/12

7:15 am-1:15 pm

1 stop7h 00m

Colorado Springs

Mon 2/17

2:30 pm-11:25 pm

1 stop7h 55m

$321

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

Showing 1-10 of 38 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 $278). 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 December 29, 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 December 29, 2024.

The most flights from STL to USCO are scheduled on a Monday (16 on average). You will have fewer flight options on Tuesday, 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 December 29, 2024.
Read through reviews of airlines operating flights from St. Louis to Colorado, such as Frontier, Southwest and Delta. 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
4,722 reviews

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,722 reviews
Southwest
8.1
Very good
4,722 reviews

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,582 reviews
Southwest
8.1
Very good
4,722 reviews

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,546 reviews
Southwest
8.1
Very good
4,722 reviews

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,986 reviews
Southwest
8.1
Very good
4,722 reviews

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,722 reviews

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 229 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 $43. Users have also found prices from $79 and $88 on Southwest and United Airlines, 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 - Vail Eagle County or Lambert-St Louis - Colorado Springs 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 Southwest (79%), Frontier (79%) and United Airlines (68%).

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

    The cheapest flight price from St. Louis to Colorado is $52. On average you can expect to pay $652. The most popular route, (Lambert-St Louis - Denver Intl), can usually be booked for $122.

  • 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 $278). 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.

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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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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 2,558,603 searches. Data last updated December 29, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$46Average$119FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$149Average$521FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$163Average$318FlexibilityNo cancel feeOn-time63%
DeltaCheapest$168Average$291FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$192Average$422FlexibilityNo cancel feeOn-time71%
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