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Cheap flights from Denver to St. Louis from R1 854

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Denver to St. Louis

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
17:30 - 20:36DEN  Denver Intl-STL Lambert-St Louis
2h 06mdirect
United Airlines Logo
5:10 - 6:43STL  Lambert-St Louis-DEN Denver Intl
2h 33mdirect
R3 709United Airlines
Sat, Oct 10 - Tue, Oct 13
United Airlines Logo
16:38 - 22:58DEN  Denver Intl-STL Lambert-St Louis
5h 20m1 stop Chicago O'Hare Intl
United Airlines Logo
5:10 - 6:43STL  Lambert-St Louis-DEN Denver Intl
2h 33mdirect
R3 871United Airlines
Sat, Oct 10 - Tue, Oct 13
United Airlines Logo
18:00 - 21:08DEN  Denver Intl-STL Lambert-St Louis
2h 08mdirect
United Airlines Logo
18:09 - 19:45STL  Lambert-St Louis-DEN Denver Intl
2h 36mdirect
R4 034United Airlines
Tue, Dec 29 - Wed, Dec 30
Southwest Logo
6:35 - 9:35DEN  Denver Intl-STL Lambert-St Louis
2h 00mdirect
Southwest Logo
18:10 - 19:30STL  Lambert-St Louis-DEN Denver Intl
2h 20mdirect
R4 050Southwest
Tue, Oct 13 - Tue, Oct 20
Southwest Logo
20:10 - 23:15DEN  Denver Intl-STL Lambert-St Louis
2h 05mdirect
Southwest Logo
6:30 - 7:50STL  Lambert-St Louis-DEN Denver Intl
2h 20mdirect
R4 083Southwest
Tue, Oct 20 - Tue, Oct 27
United Airlines Logo
17:30 - 20:36DEN  Denver Intl-STL Lambert-St Louis
2h 06mdirect
United Airlines Logo
5:10 - 6:43STL  Lambert-St Louis-DEN Denver Intl
2h 33mdirect
R4 132United Airlines
Sat, Oct 10 - Mon, Oct 12
Southwest Logo
6:35 - 9:35DEN  Denver Intl-STL Lambert-St Louis
2h 00mdirect
Southwest Logo
5:50 - 9:15STL  Lambert-St Louis-DEN Denver Intl
4h 25m1 stop Chicago Midway
R4 213Southwest
Tue, Oct 13 - Tue, Oct 20
Southwest Logo
20:10 - 23:15DEN  Denver Intl-STL Lambert-St Louis
2h 05mdirect
Southwest Logo
5:50 - 9:15STL  Lambert-St Louis-DEN Denver Intl
4h 25m1 stop Chicago Midway
R4 245Southwest
Tue, Oct 20 - Tue, Oct 27
Delta Logo
6:05 - 14:45DEN  Denver Intl-STL Lambert-St Louis
7h 40m1 stop Minneapolis St Paul
Delta Logo
7:00 - 11:50STL  Lambert-St Louis-DEN Denver Intl
5h 50m1 stop Atlanta Hartsfield-Jackson
R4 376Delta
Sat, Oct 10 - Wed, Oct 14
Southwest Logo
8:30 - 14:00DEN  Denver Intl-STL Lambert-St Louis
4h 30m1 stop Kansas City
Southwest Logo
14:25 - 19:30STL  Lambert-St Louis-DEN Denver Intl
6h 05m1 stop Austin Bergstrom
R4 392Southwest
Tue, Oct 20 - Tue, Oct 27

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Delta flights from Denver to St. Louis

Our best Delta deals on Denver to St. Louis flight tickets
Delta
Oct 10
DEN6:05Denver Intl
7h 40m
1 stop
STL14:45Lambert-St Louis
Oct 14
STL7:00Lambert-St Louis
5h 50m
1 stop
DEN11:50Denver Intl
R4 376
Delta
Oct 12
DEN18:00Denver Intl
5h 44m
1 stop
STL0:44Lambert-St Louis
Oct 17
STL17:38Lambert-St Louis
5h 54m
1 stop
DEN22:32Denver Intl
R4 799
Delta
Oct 8
DEN0:59Denver Intl
7h 50m
1 stop
STL9:49Lambert-St Louis
Oct 13
STL14:22Lambert-St Louis
6h 12m
1 stop
DEN19:34Denver Intl
R5 108

United Airlines flights from Denver to St. Louis

Our best United Airlines deals on Denver to St. Louis flight tickets
United Airlines
Oct 10
DEN17:30Denver Intl
2h 06m
STL20:36Lambert-St Louis
Oct 13
STL5:10Lambert-St Louis
2h 33m
DEN6:43Denver Intl
R3 709
United Airlines
Oct 10
DEN16:38Denver Intl
5h 20m
1 stop
STL22:58Lambert-St Louis
Oct 13
STL5:10Lambert-St Louis
2h 33m
DEN6:43Denver Intl
R3 871
United Airlines
Dec 29
DEN18:00Denver Intl
2h 08m
STL21:08Lambert-St Louis
Dec 30
STL18:09Lambert-St Louis
2h 36m
DEN19:45Denver Intl
R4 034

momondo Fare Finder

 
Use the filters below to find and compare flights from Denver to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Sat 10/10

17:30-20:36

Nonstop2h 06m

Lambert-St Louis

Tue 13/10

5:10-6:43

Nonstop2h 33m

R3 709

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Sat 10/10

16:38-22:58

1 stop5h 20m

Lambert-St Louis

Tue 13/10

5:10-6:43

Nonstop2h 33m

R3 871

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Tue 29/12

18:00-21:08

Nonstop2h 08m

Lambert-St Louis

Wed 30/12

18:09-19:45

Nonstop2h 36m

R4 034
Fastest return journey

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Tue 13/10

6:35-9:35

Nonstop2h 00m

Lambert-St Louis

Tue 20/10

18:10-19:30

Nonstop2h 20m

R4 050

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Tue 20/10

20:10-23:15

Nonstop2h 05m

Lambert-St Louis

Tue 27/10

6:30-7:50

Nonstop2h 20m

R4 083

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Sat 10/10

17:30-20:36

Nonstop2h 06m

Lambert-St Louis

Mon 12/10

5:10-6:43

Nonstop2h 33m

R4 132

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Tue 13/10

6:35-9:35

Nonstop2h 00m

Lambert-St Louis

Tue 20/10

5:50-9:15

1 stop4h 25m

R4 213

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Tue 20/10

20:10-23:15

Nonstop2h 05m

Lambert-St Louis

Tue 27/10

5:50-9:15

1 stop4h 25m

R4 245

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Sat 10/10

6:05-14:45

1 stop7h 40m

Lambert-St Louis

Wed 14/10

7:00-11:50

1 stop5h 50m

R4 376

DenverSt. Louis

DEN Denver Intl - STL Lambert-St Louis

DENSTL

Denver Intl

Tue 20/10

8:30-14:00

1 stop4h 30m

Lambert-St Louis

Tue 27/10

14:25-19:30

1 stop6h 05m

R4 392

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

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

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

Prices are currently typical for flights on this route.

Typical prices usually range from R3 123 to R5 953.
The lowest price recently found on this route was R3 709.

What is the cheapest month to fly to St. Louis?

In general, January is the cheapest month to fly from Denver to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around R2 847. If you aren’t able to travel to St. Louis during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of R4 115.

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

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

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

You are more likely to see cheaper flights to St. Louis from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around R4 645 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Denver for as low as R3 904 on momondo.

What cabin class options are available on Denver to St. Louis flights?

There is only 1 cabin class available to choose from on Denver to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of September 2026, prices for Denver to St. Louis flights are approximately 15% more expensive when compared to flights at the same time last year.

When to book flights from Denver to St. Louis

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

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

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

Best price found

R1 854

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Denver in the past 72 hours is R1 854. The best return flight deal from Denver to St. Louis found on momondo in the last 72 hours is R3 709.
Direct flights go from Denver to St. Louis every day.
There is 1 airport in St. Louis. From Denver there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Denver to St. Louis

  • How far is Denver Intl to Lambert-St Louis by plane?

    Lambert-St Louis is 1278,1 km away from Denver Intl.

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

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

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

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis 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 Lambert-St Louis 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 Denver to St. Louis?

Why use momondo?

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

Finding the right flight to St. Louis from Denver 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 St. Louis quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Denver to St. Louis flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Denver and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Denver to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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