How many flights depart from St. Louis to Colorado on average per day?

6 flights are operational daily from St. Louis to Colorado as of February 2026. The most popular departure time for this route is 8:00AM, with 36% of flights per day taking off at noon.

What airlines fly to Colorado?

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to Colorado from St. Louis according to our data. Frontier is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 5 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

How many flights depart from St. Louis to Colorado on average per week?

The number of flights available between St. Louis and Colorado is 47 per week as of February 2026. The most frequent departure day is Thu, with 30% of weekly flights leaving on this day.

What is the cheapest airline that flies from Lambert-St Louis to Colorado?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from Lambert-St Louis to Colorado

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

Prices for flights from Lambert-St Louis Airport to Colorado refresh daily.

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

As of February 2026, there are 5 operators available to choose from for flights from Lambert-St Louis Airport to Colorado.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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.

What documentation or ID do you need to fly to Colorado?

The travel and health documents you'll need for your trip to Colorado may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Colorado. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$64 Cheap Flights from St. Louis to Colorado in 2026

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:12 pm - 9:49 pm

STL

DEN

2h 37mnonstop

6:35 am - 9:49 am

DEN

STL

2h 14mnonstop

$71Frontier

Sat, Mar 7 - Wed, Mar 11

8:12 pm - 9:45 pm

STL

DEN

2h 33mnonstop

4:00 pm - 7:12 pm

DEN

STL

2h 12mnonstop

$72Frontier

Fri, May 1 - Sat, May 2

8:12 pm - 9:49 pm

STL

DEN

2h 37mnonstop

6:35 am - 9:49 am

DEN

STL

2h 14mnonstop

$77Frontier

Sat, Mar 7 - Wed, Mar 11

1:54 pm - 3:30 pm

STL

DEN

2h 36mnonstop

6:35 am - 9:49 am

DEN

STL

2h 14mnonstop

$85Frontier

Mon, Mar 2 - Mon, Mar 9

8:12 pm - 9:49 pm

STL

DEN

2h 37mnonstop

6:35 am - 9:49 am

DEN

STL

2h 14mnonstop

$86Frontier

Mon, Mar 16 - Mon, Mar 23

4:30 pm - 8:22 pm

STL

GUC

4h 52m

1 stop

7:08 am - 1:14 pm

GUC

STL

5h 06m

1 stop

$211United Airlines

Tue, Feb 24 - Sat, Feb 28

7:41 am - 2:42 pm

STL

GUC

8h 01m

2 stops

8:30 am - 4:02 pm

GUC

STL

6h 32m

1 stop

$216United Airlines

Tue, Feb 24 - Sat, Feb 28

7:00 am - 1:56 pm

STL

MTJ

7h 56m

1 stop

10:35 am - 5:13 pm

MTJ

STL

5h 38m

1 stop

$239American Airlines

Mon, Feb 23 - Sat, Feb 28

5:45 am - 10:00 am

STL

COS

5h 15m

1 stop

6:00 am - 12:10 pm

COS

STL

5h 10m

2 stops

$264Southwest

Thu, Mar 5 - Tue, Mar 10

5:12 am - 9:52 am

STL

DRO

5h 40m

1 stop

12:14 pm - 7:29 pm

DRO

STL

6h 15m

1 stop

$268American Airlines

Fri, Mar 27 - Tue, Mar 31

Frontier flights from St. Louis to Colorado

Our best Frontier deals on St. Louis to Colorado flight tickets

Frontier

Mar 7

STL8:12 pmLambert-St Louis

2h 37m

DEN9:49 pmDenver Intl

Mar 11

DEN6:35 amDenver Intl

2h 14m

STL9:49 amLambert-St Louis

$71

Frontier

Mar 7

STL8:12 pmLambert-St Louis

2h 37m

DEN9:49 pmDenver Intl

Mar 11

DEN6:35 amDenver Intl

2h 14m

STL9:49 amLambert-St Louis

$77

Frontier

Mar 2

STL1:54 pmLambert-St Louis

2h 36m

DEN3:30 pmDenver Intl

Mar 9

DEN6:35 amDenver Intl

2h 14m

STL9:49 amLambert-St Louis

$85

Southwest flights from St. Louis to Colorado

Our best Southwest deals on St. Louis to Colorado flight tickets

Southwest

Mar 5

STL5:45 amLambert-St Louis

5h 15m

1 stop

COS10:00 amColorado Springs

Mar 10

COS6:00 amColorado Springs

5h 10m

2 stops

STL12:10 pmLambert-St Louis

$264

Southwest

Mar 5

STL11:25 amLambert-St Louis

11h 25m

2 stops

COS9:50 pmColorado Springs

Mar 10

COS6:00 amColorado Springs

5h 10m

2 stops

STL12:10 pmLambert-St Louis

$315

Southwest

Apr 2

STL5:25 amLambert-St Louis

7h 00m

1 stop

COS11:25 amColorado Springs

Apr 6

COS4:45 pmColorado Springs

6h 20m

1 stop

STL12:05 amLambert-St Louis

$320

Fly from

Fly to

Route

Depart

Return

Price

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Sat 3/7

8:12 pm-9:49 pm

Nonstop2h 37m

Denver Intl

Wed 3/11

6:35 am-9:49 am

Nonstop2h 14m

$71

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Fri 5/1

8:12 pm-9:45 pm

Nonstop2h 33m

Denver Intl

Sat 5/2

4:00 pm-7:12 pm

Nonstop2h 12m

$72

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Sat 3/7

8:12 pm-9:49 pm

Nonstop2h 37m

Denver Intl

Wed 3/11

6:35 am-9:49 am

Nonstop2h 14m

$77

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Mon 3/2

1:54 pm-3:30 pm

Nonstop2h 36m

Denver Intl

Mon 3/9

6:35 am-9:49 am

Nonstop2h 14m

$85

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Mon 3/16

8:12 pm-9:49 pm

Nonstop2h 37m

Denver Intl

Mon 3/23

6:35 am-9:49 am

Nonstop2h 14m

$86

St. LouisGunnison

STL - GUC

STLGUC

Lambert-St Louis

Tue 2/24

4:30 pm-8:22 pm

1 stop4h 52m

Gunnison

Sat 2/28

7:08 am-1:14 pm

1 stop5h 06m

$211

St. LouisGunnison

STL - GUC

STLGUC

Lambert-St Louis

Tue 2/24

7:41 am-2:42 pm

2 stops8h 01m

Gunnison

Sat 2/28

8:30 am-4:02 pm

1 stop6h 32m

$216

St. LouisMontrose

STL - MTJ

STLMTJ

Lambert-St Louis

Mon 2/23

7:00 am-1:56 pm

1 stop7h 56m

Montrose County

Sat 2/28

10:35 am-5:13 pm

1 stop5h 38m

$239

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Thu 3/5

5:45 am-10:00 am

1 stop5h 15m

Colorado Springs

Tue 3/10

6:00 am-12:10 pm

2 stops5h 10m

$264

St. LouisDurango

STL - DRO

STLDRO

Lambert-St Louis

Fri 3/27

5:12 am-9:52 am

1 stop5h 40m

Durango La Plata County

Tue 3/31

12:14 pm-7:29 pm

1 stop6h 15m

$268

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Prices

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What is the cheapest month to fly to Colorado?

The month of October is, on average, the cheapest month to fly to Colorado from St. Louis, with most prices found around $177. The month of September is another great option to travel to Colorado, with average flight prices from St. Louis averaging around $193.

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

The cheapest day to depart from St. Louis to Colorado is on a Wednesday when prices can be found for as low as $297. On the other hand, Sunday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $421.

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

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $186. At noon is when there is more demand to fly to Colorado, so prices are often more expensive at around $472 per ticket.

What is the cheapest Lambert-St Louis to Colorado flight route?

Fly from Lambert-St Louis to Denver Intl for the best Lambert-St Louis - Colorado flight prices

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

You are more likely to see cheaper flights to Colorado from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Colorado for around $230 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado from St. Louis for as low as $165 on momondo.

What cabin class options are available on Lambert-St Louis to Colorado flights?

There are 4 cabin classes available to choose from on Lambert-St Louis to Colorado flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Colorado flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Colorado.

Cheap St. Louis to Colorado flight deals and tips

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

Best Price Found	$144
Fastest flight time	2h 20m
Direct flights	Every day
Airports in Colorado	87 airports

The best one-way flight to Colorado from St. Louis in the past 72 hours is $144. The best round-trip flight deal from St. Louis to Colorado found on momondo in the last 72 hours is $239.

The fastest flight from St. Louis to Colorado takes 2h 20m

Direct flights go from St. Louis to Colorado every day.

There are 87 airports in Colorado. From St. Louis there are direct flights to Denver Intl (DEN).

Search flight deals

When did momondo last update prices for flights from Lambert-St Louis Airport to Colorado?
Prices for flights from Lambert-St Louis Airport to Colorado refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Colorado?
As of February 2026, there are 5 operators available to choose from for flights from Lambert-St Louis Airport to Colorado.
How old do you have to be to fly from Lambert-St Louis Airport to Colorado?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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.
What documentation or ID do you need to fly to Colorado?
The travel and health documents you'll need for your trip to Colorado may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Colorado. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from St. Louis to Colorado?
Based on momondo bookings for flights between St. Louis and Colorado, the leading plane model is Boeing 737 MAX 8, making up 21.86% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 18.86%, Boeing 737-800 with 13.02%, and Airbus A319 with 11.13%.

Best airlines flying from St. Louis to Colorado

Compare and see reviews for airlines that fly from St. Louis to Colorado with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $51	Free Cancellation	Rating 5.7 3,052 reviews	Search Frontier flights
Delta	PriceFrom $108	Free Cancellation	Rating 7.9 8,177 reviews	Search Delta flights
United Airlines	PriceFrom $156	Free Cancellation	Rating 7.4 9,276 reviews	Search United Airlines flights
Southwest	PriceFrom $176	Free Cancellation	Rating 8.0 4,280 reviews	Search Southwest flights
American Airlines	PriceFrom $201	Free Cancellation	Rating 7.2 11,267 reviews	Search American Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Colorado. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from St. Louis to Colorado on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Colorado from St. Louis.

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

Yes. momondo can track prices for St. Louis to Colorado flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Cheap flights from St. Louis to Colorado from $64

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 Colorado departing on 3/4. 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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How to get the cheapest flight ticket from St. Louis to Colorado

What is the cheapest month to fly to Colorado?

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

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

What is the cheapest Lambert-St Louis to Colorado flight route?

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

What cabin class options are available on Lambert-St Louis to Colorado flights?

Can stopping save me money on St. Louis to Colorado flights?

What is the cheapest airline that flies from Lambert-St Louis to Colorado?

What airlines fly to Colorado?

How many flights depart from St. Louis to Colorado on average per day?

How many flights depart from St. Louis to Colorado on average per week?

Cheap St. Louis to Colorado flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Colorado

Best airlines flying from St. Louis to Colorado

Compare and see reviews for airlines that fly from St. Louis to Colorado with momondo

Why use momondo?

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

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

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

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

An easier way to manage your Colorado trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Colorado

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