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

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

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 39% 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 day?

5 flights are operational daily from St. Louis to Colorado as of December 2025. The most popular departure time for this route is 1:00PM, with 54% of flights per day taking off in the afternoon.

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

The number of flights available between St. Louis and Colorado is 38 per week as of December 2025. The most frequent departure day is Wed, with 34% of weekly flights leaving on this day.

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 December 2025, 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.

$29 Cheap Flights from St. Louis to Colorado in 2025/26

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:43 pm - 9:15 pm

STL

DEN

2h 32mnonstop

9:41 am - 12:50 pm

DEN

STL

2h 09mnonstop

$79Frontier

Mon, Jan 12 - Mon, Jan 26

1:40 pm - 3:16 pm

STL

DEN

2h 36mnonstop

3:38 pm - 6:44 pm

DEN

STL

2h 06mnonstop

$83Frontier

Mon, Jan 26 - Fri, Jan 30

8:45 am - 12:36 pm

STL

DRO

4h 51m1 stop

7:00 am - 1:16 pm

DRO

STL

5h 16m1 stop

$200United Airlines

Fri, Jan 9 - Mon, Jan 12

8:45 am - 12:36 pm

STL

DRO

4h 51m1 stop

11:40 am - 10:58 pm

DRO

STL

10h 18m2 stops

$206United Airlines

Fri, Jan 9 - Mon, Jan 12

6:00 am - 12:41 pm

STL

HDN

7h 41m1 stop

1:46 pm - 11:37 pm

HDN

STL

8h 51m1 stop

$217Delta

Sun, Jan 25 - Fri, Jan 30

7:10 am - 12:41 pm

STL

HDN

6h 31m1 stop

1:46 pm - 11:37 pm

HDN

STL

8h 51m1 stop

$228Delta

Sun, Jan 25 - Thu, Jan 29

11:55 am - 6:18 pm

STL

EGE

7h 23m1 stop

4:04 pm - 12:05 am

EGE

STL

7h 01m1 stop

$229American Airlines

Sat, Feb 7 - Fri, Feb 13

6:00 am - 10:09 am

STL

EGE

5h 09m1 stop

2:35 pm - 11:18 pm

EGE

STL

7h 43m1 stop

$284American Airlines

Fri, Feb 20 - Wed, Feb 25

10:15 am - 5:05 pm

STL

COS

7h 50m2 stops

6:40 am - 3:00 pm

COS

STL

7h 20m2 stops

$323Southwest

Wed, Jan 21 - Wed, Jan 28

3:25 pm - 11:20 pm

STL

COS

8h 55m2 stops

5:00 am - 11:00 am

COS

STL

5h 00m1 stop

$325Southwest

Fri, Feb 27 - Sun, Mar 1

Frontier flights from St. Louis to Colorado

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

Frontier

Jan 12

STL7:43 pmLambert-St Louis

2h 32m

DEN9:15 pmDenver Intl

Jan 26

DEN9:41 amDenver Intl

2h 09m

STL12:50 pmLambert-St Louis

$79

Find similar

Frontier

Jan 26

STL1:40 pmLambert-St Louis

2h 36m

DEN3:16 pmDenver Intl

Jan 30

DEN3:38 pmDenver Intl

2h 06m

STL6:44 pmLambert-St Louis

$83

Find similar

Frontier

Feb 20

STL1:59 pmLambert-St Louis

2h 36m

DEN3:35 pmDenver Intl

Feb 23

DEN10:01 amDenver Intl

2h 08m

STL1:09 pmLambert-St Louis

$84

Find similar

Southwest flights from St. Louis to Colorado

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

Southwest

Jan 21

STL10:15 amLambert-St Louis

7h 50m

2 stops

COS5:05 pmColorado Springs

Jan 28

COS6:40 amColorado Springs

7h 20m

2 stops

STL3:00 pmLambert-St Louis

$323

Find similar

Southwest

Feb 27

STL3:25 pmLambert-St Louis

8h 55m

2 stops

COS11:20 pmColorado Springs

Mar 1

COS5:00 amColorado Springs

5h 00m

1 stop

STL11:00 amLambert-St Louis

$325

Find similar

Southwest

Jan 31

STL1:50 pmLambert-St Louis

6h 40m

2 stops

COS7:30 pmColorado Springs

Feb 4

COS7:20 amColorado Springs

8h 30m

2 stops

STL4:50 pmLambert-St Louis

$329

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Mon 1/12

7:43 pm-9:15 pm

Nonstop2h 32m

Denver Intl

Mon 1/26

9:41 am-12:50 pm

Nonstop2h 09m

$79

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Mon 1/26

1:40 pm-3:16 pm

Nonstop2h 36m

Denver Intl

Fri 1/30

3:38 pm-6:44 pm

Nonstop2h 06m

$83

St. LouisDurango

STL - DRO

STLDRO

Lambert-St Louis

Fri 1/9

8:45 am-12:36 pm

1 stop4h 51m

Durango La Plata County

Mon 1/12

7:00 am-1:16 pm

1 stop5h 16m

$200

St. LouisDurango

STL - DRO

STLDRO

Lambert-St Louis

Fri 1/9

8:45 am-12:36 pm

1 stop4h 51m

Durango La Plata County

Mon 1/12

11:40 am-10:58 pm

2 stops10h 18m

$206

St. LouisHayden

STL - HDN

STLHDN

Lambert-St Louis

Sun 1/25

6:00 am-12:41 pm

1 stop7h 41m

Hayden Yampa Valley

Fri 1/30

1:46 pm-11:37 pm

1 stop8h 51m

$217

St. LouisHayden

STL - HDN

STLHDN

Lambert-St Louis

Sun 1/25

7:10 am-12:41 pm

1 stop6h 31m

Hayden Yampa Valley

Thu 1/29

1:46 pm-11:37 pm

1 stop8h 51m

$228

St. LouisVail

STL - EGE

STLEGE

Lambert-St Louis

Sat 2/7

11:55 am-6:18 pm

1 stop7h 23m

Vail Eagle County

Fri 2/13

4:04 pm-12:05 am

1 stop7h 01m

$229

St. LouisVail

STL - EGE

STLEGE

Lambert-St Louis

Fri 2/20

6:00 am-10:09 am

1 stop5h 09m

Vail Eagle County

Wed 2/25

2:35 pm-11:18 pm

1 stop7h 43m

$284

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Wed 1/21

10:15 am-5:05 pm

2 stops7h 50m

Colorado Springs

Wed 1/28

6:40 am-3:00 pm

2 stops7h 20m

$323

St. LouisColorado Springs

STL - COS

STLCOS

Lambert-St Louis

Fri 2/27

3:25 pm-11:20 pm

2 stops8h 55m

Colorado Springs

Sun 3/1

5:00 am-11:00 am

1 stop5h 00m

$325

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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

Airlines

Other information

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 January is another great option to travel to Colorado, with average flight prices from St. Louis averaging around $197.

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 $292. 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 $425.

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 $178. At noon is when there is more demand to fly to Colorado, so prices are often more expensive at around $473 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 $169 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	$140
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 $140. The best round-trip flight deal from St. Louis to Colorado found on momondo in the last 72 hours is $227.

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 December 2025, 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 21.04% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 15.56%, Airbus A320-100/200 with 10.45%, and Boeing 737-700 Passenger/BBJ1 (winglets) with 10.45%.

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 $50	Free Cancellation	Rating 5.8 3,081 reviews	Search Frontier flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights
United Airlines	PriceFrom $157	Free Cancellation	Rating 7.4 9,091 reviews	Search United Airlines flights
Southwest	PriceFrom $176	Free Cancellation	Rating 7.9 4,250 reviews	Search Southwest flights
American Airlines	PriceFrom $201	Free Cancellation	Rating 7.2 11,054 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.

An easier way to manage your Colorado trip

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Popular cities in Colorado

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Cheap flights from St. Louis to Colorado from $29

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 1/31. 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?

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 January is another great option to travel to Colorado, with average flight prices from St. Louis averaging around $197.

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?

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $178. At noon is when there is more demand to fly to Colorado, so prices are often more expensive at around $473 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?

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.

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

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

What airlines fly to Colorado?

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

5 flights are operational daily from St. Louis to Colorado as of December 2025. The most popular departure time for this route is 1:00PM, with 54% of flights per day taking off in the afternoon.

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

The number of flights available between St. Louis and Colorado is 38 per week as of December 2025. The most frequent departure day is Wed, with 34% of weekly flights leaving on this day.

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

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

How many operators does momondo search 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?

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

What is the most popular plane model from St. Louis to 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

Popular cities in Colorado

Popular flights according to clicks in the last 7 days on momondo