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

As of September 2026, there are 9 flights per day flying from St. Louis to Denver. The most common time of day flights depart is 9:00, with 47% of flights taking off in the afternoon.

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

63 flights are operational weekly from St. Louis to Denver as of September 2026. The most popular departure day for this route is Mon, with 24% of flights per week taking off on this day.

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

United Airlines, Southwest, and Delta are the most popular carriers operating from Lambert-St Louis to Denver Intl

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

Prices for flights from Lambert-St Louis Airport to Denver Intl Airport are updated daily.

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

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 stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Denver Intl Airport.

What documentation or ID do you need to fly to Denver Intl Airport?

The travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

R1 450 Cheap Flights from St. Louis to Denver in 2026/27

Find the cheapest flights from St. Louis to Denver

Return

One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

17:30 - 18:50STL Lambert-St Louis-DEN Denver Intl

2h 20mdirect

7:45 - 10:45DEN Denver Intl-STL Lambert-St Louis

2h 00mdirect

R2 884Southwest

Sat, Oct 24 - Sat, Oct 31

20:50 - 22:15STL Lambert-St Louis-DEN Denver Intl

2h 25mdirect

13:30 - 17:45DEN Denver Intl-STL Lambert-St Louis

3h 15m1 stop Omaha Eppley Airfield

R2 982Southwest

Tue, Oct 20 - Tue, Oct 27

17:30 - 18:50STL Lambert-St Louis-DEN Denver Intl

2h 20mdirect

8:05 - 16:25DEN Denver Intl-STL Lambert-St Louis

7h 20m1 stop Phoenix Sky Harbor Intl

R3 047Southwest

Sat, Oct 24 - Sat, Oct 31

17:20 - 22:25STL Lambert-St Louis-DEN Denver Intl

6h 05m1 stop Houston Hobby

13:30 - 17:45DEN Denver Intl-STL Lambert-St Louis

3h 15m1 stop Omaha Eppley Airfield

R3 128Southwest

Tue, Oct 20 - Tue, Oct 27

10:25 - 15:13STL Lambert-St Louis-DEN Denver Intl

5h 48m1 stop Atlanta Hartsfield-Jackson

6:10 - 13:23DEN Denver Intl-STL Lambert-St Louis

6h 13m1 stop Detroit Metropolitan Wayne County

R3 210Delta

Tue, Nov 3 - Thu, Nov 12

10:35 - 15:40STL Lambert-St Louis-DEN Denver Intl

6h 05m2 stops Kansas City Dallas Love Field

16:30 - 22:40DEN Denver Intl-STL Lambert-St Louis

5h 10m1 stop Houston Hobby

R3 291Southwest

Sat, Nov 7 - Mon, Nov 9

16:50 - 18:10STL Lambert-St Louis-DEN Denver Intl

2h 20mdirect

20:10 - 23:15DEN Denver Intl-STL Lambert-St Louis

2h 05mdirect

R3 324Southwest

Fri, Oct 23 - Tue, Oct 27

9:25 - 15:40STL Lambert-St Louis-DEN Denver Intl

7h 15m2 stops Nashville Intl Little Rock

11:05 - 20:05DEN Denver Intl-STL Lambert-St Louis

8h 00m2 stops Oklahoma City Will Rogers World Dallas Love Field

R3 373Southwest

Sat, Oct 31 - Sat, Nov 7

8:30 - 13:10STL Lambert-St Louis-DEN Denver Intl

5h 40m1 stop New Orleans Louis Armstrong

7:10 - 10:10DEN Denver Intl-STL Lambert-St Louis

2h 00mdirect

R3 454Southwest

Wed, Oct 7 - Mon, Oct 12

18:58 - 23:20STL Lambert-St Louis-DEN Denver Intl

5h 22m1 stop Chicago O'Hare Intl

18:00 - 21:08DEN Denver Intl-STL Lambert-St Louis

2h 08mdirect

R3 487United Airlines

Fri, Dec 25 - Tue, Dec 29

Cheap last-minute flights

Enter your travel dates to find the best prices.

5:10 - 6:43STL Lambert-St Louis-DEN Denver Intl

2h 33mdirect

17:52 - 20:59DEN Denver Intl-STL Lambert-St Louis

2h 07mdirect

R8 179United Airlines

Tue, Sep 29 - Thu, Oct 29

15:11 - 19:45STL Lambert-St Louis-DEN Denver Intl

5h 34m1 stop Chicago O'Hare Intl

17:52 - 20:59DEN Denver Intl-STL Lambert-St Louis

2h 07mdirect

R8 342United Airlines

Tue, Sep 29 - Thu, Oct 29

9:04 - 14:32STL Lambert-St Louis-DEN Denver Intl

6h 28m1 stop Chicago O'Hare Intl

16:38 - 22:58DEN Denver Intl-STL Lambert-St Louis

5h 20m1 stop Chicago O'Hare Intl

R8 912United Airlines

Sat, Sep 26 - Sat, Oct 3

5:10 - 6:43STL Lambert-St Louis-DEN Denver Intl

2h 33mdirect

20:28 - 23:44DEN Denver Intl-STL Lambert-St Louis

2h 16mdirect

R9 385United Airlines

Tue, Sep 29 - Mon, Oct 12

10:27 - 14:32STL Lambert-St Louis-DEN Denver Intl

5h 05m1 stop Chicago O'Hare Intl

20:28 - 23:44DEN Denver Intl-STL Lambert-St Louis

2h 16mdirect

R9 548United Airlines

Tue, Sep 29 - Mon, Oct 12

8:25 - 13:05STL Lambert-St Louis-DEN Denver Intl

5h 40m2 stops Chicago Midway Milwaukee-Mitchell

8:45 - 16:05DEN Denver Intl-STL Lambert-St Louis

6h 20m2 stops Colorado Springs Dallas Love Field

R10 297Southwest

Sat, Sep 26 - Sat, Oct 24

5:10 - 6:43STL Lambert-St Louis-DEN Denver Intl

2h 33mdirect

17:52 - 20:59DEN Denver Intl-STL Lambert-St Louis

2h 07mdirect

R10 542United Airlines

Tue, Sep 29 - Thu, Oct 29

5:10 - 6:43STL Lambert-St Louis-DEN Denver Intl

2h 33mdirect

13:30 - 16:37DEN Denver Intl-STL Lambert-St Louis

2h 07mdirect

R10 623United Airlines

Mon, Sep 28 - Mon, Oct 5

16:20 - 21:20STL Lambert-St Louis-DEN Denver Intl

6h 00m1 stop Houston Hobby

12:30 - 20:20DEN Denver Intl-STL Lambert-St Louis

6h 50m2 stops Cincinnati Cinci./N. Kentucky Chicago Midway

R10 705Southwest

Sat, Sep 26 - Sat, Oct 3

13:36 - 15:00STL Lambert-St Louis-DEN Denver Intl

2h 24mdirect

15:35 - 22:30DEN Denver Intl-STL Lambert-St Louis

5h 55m1 stop Houston George Bush Intcntl

R10 786United Airlines

Mon, Sep 28 - Mon, Oct 5

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Delta flights from St. Louis to Denver

Our best Delta deals on St. Louis to Denver flight tickets

Delta

Nov 3

STL10:25Lambert-St Louis

5h 48m

1 stop

DEN15:13Denver Intl

Nov 12

DEN6:10Denver Intl

6h 13m

1 stop

STL13:23Lambert-St Louis

R3 210

Delta

Oct 24

STL12:00Lambert-St Louis

6h 52m

1 stop

DEN17:52Denver Intl

Oct 30

DEN17:00Denver Intl

5h 54m

1 stop

STL23:54Lambert-St Louis

R3 650

Delta

Dec 24

STL7:05Lambert-St Louis

8h 50m

1 stop

DEN14:55Denver Intl

Dec 29

DEN5:01Denver Intl

7h 19m

1 stop

STL13:20Lambert-St Louis

R3 764

Southwest flights from St. Louis to Denver

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

Southwest

Oct 24

STL17:30Lambert-St Louis

2h 20m

DEN18:50Denver Intl

Oct 31

DEN7:45Denver Intl

2h 00m

STL10:45Lambert-St Louis

R2 884

Southwest

Oct 20

STL20:50Lambert-St Louis

2h 25m

DEN22:15Denver Intl

Oct 27

DEN13:30Denver Intl

3h 15m

1 stop

STL17:45Lambert-St Louis

R2 982

Southwest

Oct 24

STL17:30Lambert-St Louis

2h 20m

DEN18:50Denver Intl

Oct 31

DEN8:05Denver Intl

7h 20m

1 stop

STL16:25Lambert-St Louis

R3 047

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Sat 24/10

17:30-18:50

Nonstop2h 20m

Denver Intl

Sat 31/10

7:45-10:45

Nonstop2h 00m

R2 884

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Tue 20/10

20:50-22:15

Nonstop2h 25m

Denver Intl

Tue 27/10

13:30-17:45

1 stop3h 15m

R2 982

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Sat 24/10

17:30-18:50

Nonstop2h 20m

Denver Intl

Sat 31/10

8:05-16:25

1 stop7h 20m

R3 047

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Tue 20/10

17:20-22:25

1 stop6h 05m

Denver Intl

Tue 27/10

13:30-17:45

1 stop3h 15m

R3 128

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Tue 3/11

10:25-15:13

1 stop5h 48m

Denver Intl

Thu 12/11

6:10-13:23

1 stop6h 13m

R3 210

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Sat 7/11

10:35-15:40

2 stops6h 05m

Denver Intl

Mon 9/11

16:30-22:40

1 stop5h 10m

R3 291

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Fri 23/10

16:50-18:10

Nonstop2h 20m

Denver Intl

Tue 27/10

20:10-23:15

Nonstop2h 05m

R3 324

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Sat 31/10

9:25-15:40

2 stops7h 15m

Denver Intl

Sat 7/11

11:05-20:05

2 stops8h 00m

R3 373

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Wed 7/10

8:30-13:10

1 stop5h 40m

Denver Intl

Mon 12/10

7:10-10:10

Nonstop2h 00m

R3 454

St. LouisDenver

STL Lambert-St Louis - DEN Denver Intl

STLDEN

Lambert-St Louis

Fri 25/12

18:58-23:20

1 stop5h 22m

Denver Intl

Tue 29/12

18:00-21:08

Nonstop2h 08m

R3 487

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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 typical price of a round-trip flight between St. Louis and Denver?

Prices are currently typical for flights on this route.

Typical prices usually range from R2 794 to R5 678.
The lowest price recently found on this route was R2 884.

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from St. Louis is in November. Flight prices, which tend to average around R3 373, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in November, then you should wait until January to fly from St. Louis, when ticket prices are also cheap, with an average price of R3 373.

How far in advance should I book a flight from St. Louis to Denver?

You are more likely to see cheaper flights to Denver from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around R4 342 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from St. Louis for as low as R3 585 on momondo.

How have St. Louis to Denver flight prices changed over time?

As of September 2026, prices for St. Louis to Denver flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Denver according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap St. Louis to Denver (STL to DEN) flight deals and tips

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

Best price found	R1 450
Direct flights	Every day
Airports in Denver	1 airport

The best one-way flight to Denver from St. Louis in the past 72 hours is R1 450. The best return flight deal from St. Louis to Denver found on momondo in the last 72 hours is R2 884.

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

There is 1 airport in Denver. From St. Louis there are direct flights to Denver Intl (DEN).

Search flight deals

Frequently asked questions about flying from St. Louis to Denver

How far is Lambert-St Louis to Denver Intl by plane?
A flight from Lambert-St Louis to Denver Intl will travel around 1278,1 km.
When did momondo last update prices for flights from Lambert-St Louis Airport to Denver Intl Airport?
Prices for flights from Lambert-St Louis Airport to Denver Intl Airport are updated daily.
How old do you have to be to fly from Lambert-St Louis Airport to Denver Intl Airport?
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 stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from St. Louis to Denver?
Based on momondo bookings for flights between St. Louis and Denver, the leading plane model is Boeing 737 MAX 8, making up 18,12% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 16,28%, Boeing 737-800 with 12,22%, and Airbus A320neo with 11,46%.

Estes Park

Black Hawk

Manitou Springs

Why use momondo?

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

Finding the right flight to Denver from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Denver quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Denver from St. Louis with this policy.

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

momondo provides multiple filters to help you find the best flight to Denver from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for St. Louis to Denver 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.