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Cheap flights from Denver to St. Louis from $40

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to St. Louis departing on 6/12. 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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Tue 4/23

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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

$40

Fastest flight time

2h 00m

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 $40. The best round-trip flight deal from Denver to St. Louis found on momondo in the last 72 hours is $47.
The fastest flight from Denver to St. Louis takes 2h 00m
Direct flights go from Denver to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

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 cheapest month to fly from Denver to St. Louis?

February. The cheapest time of year to fly to St. Louis from Denver is February. Most expensive is December

What is the cheapest day to depart Denver for St. Louis?

Wednesday. The cheapest day of the week is typically Wednesday. The most expensive is typically Monday

When is the cheapest time to fly from Denver to St. Louis?

In the evening. Denver to St. Louis flights are approximately 31% more expensive at noon than in the evening

What is the cheapest airline that flies to St. Louis from Denver?

Frontier. American Airlines, Frontier, and United Airlines are the most popular carriers operating from Denver to St. Louis

What is the cheapest Denver to St. Louis flight route?

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

How far in advance should you book Denver to St. Louis flights?

54 days before. The cheapest time to buy a flight from Denver to St. Louis is approximately 54 days to departure

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

20 flights are operational weekly from Denver to St. Louis as of April 2024. The most popular departure time for this route is 5:00PM, with 70% of flights per day taking off in the afternoon.

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

144 flights are operational weekly from Denver to St. Louis as of April 2024. The most popular departure day for this route is Monday, with 17% of flights per week taking off on this day.

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

There are 2 cabin classes 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.

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

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

When traveling from Denver to St. Louis, the most popular airport to fly into is Lambert-St Louis Airport. The majority of travelers flying into Lambert-St Louis Airport from Denver are departing from Denver Intl Airport. If you are looking for an alternate airport near Denver Intl Airport, Colorado Springs Airport is a great option and is located in Colorado Springs. When traveling from Denver, it is helpful to have an alternative airport to fly into when you land in St. Louis. The nearest airport to Lambert-St Louis Airport is Springfield Capital Airport which is located in Springfield. In April, $99 is typically the cheapest round trip price you’ll find from Denver to St. Louis which you can find when you fly DEN — STL.

Denver Intl Airport (DEN) to Lambert-St Louis Airport (STL)$99
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Colorado Springs Airport (COS) to Lambert-St Louis Airport (STL)$217
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Denver Intl Airport (DEN) to Springfield Capital Airport (SPI)$426
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Colorado Springs Airport (COS) to Springfield Capital Airport (SPI)$988
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Easily compare round-trip flights from Denver to St. Louis

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Denver to St. Louis by changing tabs
Frontier
May 7
DEN12:45 pmDenver Intl
2h 05m
STL3:50 pmLambert-St Louis
May 8
STL8:04 pmLambert-St Louis
2h 31m
DEN9:35 pmDenver Intl
Frontier
May 18
DEN6:15 amDenver Intl
2h 10m
STL9:25 amLambert-St Louis
May 18
STL8:04 pmLambert-St Louis
2h 31m
DEN9:35 pmDenver Intl
Frontier
Apr 27
DEN6:41 amDenver Intl
2h 06m
STL9:47 amLambert-St Louis
Apr 30
STL4:50 pmLambert-St Louis
2h 30m
DEN6:20 pmDenver Intl
Multiple Airlines
May 8
DEN6:41 amDenver Intl
2h 06m
STL9:47 amLambert-St Louis
May 8
STL12:00 pmLambert-St Louis
9h 22m
2 stops
DEN8:22 pmDenver Intl
Frontier
May 13
DEN6:41 amDenver Intl
2h 06m
STL9:47 amLambert-St Louis
May 18
STL8:04 pmLambert-St Louis
2h 31m
DEN9:35 pmDenver Intl
Frontier
May 2
DEN7:30 amDenver Intl
2h 08m
STL10:38 amLambert-St Louis
May 7
STL4:50 pmLambert-St Louis
2h 30m
DEN6:20 pmDenver Intl

Find the cheapest one-way flights from Denver to St. Louis

If you're looking for one-way flights from Denver to St. Louis, view some of our deals below provided by Frontier and United Airlines
Frontier
Jun 12
DEN6:20 amDenver Intl
2h 10m
STL9:30 amLambert-St Louis
Frontier
Jun 11
DEN11:39 amDenver Intl
2h 08m
STL2:47 pmLambert-St Louis
Multiple Airlines
May 11
DEN6:50 pmDenver Intl
22h 50m
2 stops
STL6:40 pmLambert-St Louis

Search last-minute flights to St. Louis from Denver

Find and compare round-trip flight prices for your last-minute flight from Denver to St. Louis
Frontier
Apr 21
DEN11:20 amDenver Intl
2h 09m
STL2:29 pmLambert-St Louis
Apr 27
STL8:04 pmLambert-St Louis
2h 31m
DEN9:35 pmDenver Intl
Multiple Airlines
Apr 17
DEN6:41 amDenver Intl
2h 06m
STL9:47 amLambert-St Louis
Apr 18
STL12:00 pmLambert-St Louis
9h 22m
2 stops
DEN8:22 pmDenver Intl
Frontier
Apr 21
DEN12:31 pmDenver Intl
20h 47m
1 stop
STL10:18 amLambert-St Louis
Apr 27
STL8:04 pmLambert-St Louis
2h 31m
DEN9:35 pmDenver Intl
Frontier
Apr 20
DEN6:41 amDenver Intl
2h 06m
STL9:47 amLambert-St Louis
Apr 21
STL3:29 pmLambert-St Louis
2h 33m
DEN5:02 pmDenver Intl
Frontier
Apr 18
DEN7:10 amDenver Intl
2h 08m
STL10:18 amLambert-St Louis
Apr 20
STL8:04 pmLambert-St Louis
2h 31m
DEN9:35 pmDenver Intl
Frontier
Apr 20
DEN6:41 amDenver Intl
2h 06m
STL9:47 amLambert-St Louis
Apr 22
STL8:04 pmLambert-St Louis
2h 31m
DEN9:35 pmDenver Intl

Best airlines flying from Denver to St. Louis

Compare and see reviews for airlines that fly from Denver to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $51Free CancellationRating
6.3
4,202 reviews
Search Frontier flights
United AirlinesPriceFrom $114Free CancellationRating
7.4
11,391 reviews
Search United Airlines flights
American AirlinesPriceFrom $237Free CancellationRating
7.3
15,011 reviews
Search American Airlines flights
  • United Airlines Flights From Denver to St. Louis

    United Airlines is one of the most popular airlines flying from Denver to St. Louis, operating 25 flights/week on average for this route. A good United Airlines flight deal for Denver to St. Louis starts from $114 round-trip, up to an average price of $298. Our users have rated United Airlines at 7.4/10.

  • Frontier Flights From Denver to St. Louis

    Another popular option for Denver to St. Louis flights is Frontier (6.3/10, 4,202 ratings). Frontier flies from Denver to St. Louis around 5 times per week, with deals starting from $51 round-trip and rising to an average price of around $129.


Southwest flights from Denver to St. Louis

Our best Southwest deals on Denver to St. Louis flight tickets
Southwest
May 6
DEN8:10 pmDenver Intl
2h 00m
STL11:10 pmLambert-St Louis
May 8
STL5:45 amLambert-St Louis
2h 20m
DEN7:05 amDenver Intl
Southwest
May 6
DEN5:25 amDenver Intl
5h 40m
1 stop
STL12:05 pmLambert-St Louis
May 8
STL9:30 pmLambert-St Louis
2h 20m
DEN10:50 pmDenver Intl

Delta flights from Denver to St. Louis

Our best Delta deals on Denver to St. Louis flight tickets
Delta
Jun 1
DEN5:40 amDenver Intl
6h 52m
1 stop
STL1:32 pmLambert-St Louis
Jun 2
STL6:50 pmLambert-St Louis
5h 24m
1 stop
DEN11:14 pmDenver Intl
Delta
May 31
DEN12:30 amDenver Intl
7h 35m
1 stop
STL9:05 amLambert-St Louis
Jun 2
STL6:50 pmLambert-St Louis
5h 24m
1 stop
DEN11:14 pmDenver Intl
Delta
May 6
DEN6:15 pmDenver Intl
5h 25m
1 stop
STL12:40 amLambert-St Louis
May 8
STL5:30 pmLambert-St Louis
6h 44m
1 stop
DEN11:14 pmDenver Intl

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

    The distance between Denver Intl and Lambert-St Louis is about 794.2 mi. A reasonable flight in good conditions will take 2h 00m.

  • 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 were last updated today.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.


What are the benefits of the different airports in Denver and St. Louis?

For those that wish to drive themselves to the Denver International Airport before flights from Denver to St. Louis, the Denver International Airport not only offers a host of different parking options but also offers the ability to charge up to 36 electric vehicles in their lots and garages. There are also 27 spaces dedicated to hybrid vehicles. If you are a mother that is nursing while you are traveling from Denver to St. Louis, the Denver International Airport has three different nursing rooms offering comfortable seating, power outlets, sinks, changing tables, and they are wheelchair accessible. If you have brought children along on your trip between Denver and St. Louis, the Lambert-St. Louis International Airport has something called the Children's Play Port, which is a transportation-themed educational play exhibit that features an air traffic control tower, a Metrolink light rail train, and an airplane, all perfectly sized for kids. If you have brought a service animal with you on your trip from Denver to St. Louis and they are in need of a stop after a long flight, you'll be happy to know that there are six pet relief areas outside the terminal buildings and in each concourse of the airport in St. Louis.


What is the best way to get in and out of airports in Denver and St. Louis?

For fliers that are planning to travel from downtown Denver to the Denver International Airport before flights from Denver to St. Louis, there are several ground transportation choices. One cost-effective option is to ride on the Regional Transport District light-rail route A that offers service from Union Station in downtown Denver to the Denver International Airport. Another option before Denver to St. Louis flights is to ride on city buses 83L or 83D from the Civic Center Station in downtown to the Nine Mile Station and then take the AT line bus to the airport. For travelers who prefer to go to the airport by car, there are plenty of taxi and rideshare options available to get you from downtown to the airport. Once you have arrived at the Lambert-St. Louis International Airport, a good choice for ground transportation to get you to the center of St. Louis is aboard the Greyhound bus that offers direct service from the airport to downtown. Another choice for those arriving on flights from Denver to St. Louis is on the Metro St. Louis MLR train route that operates between the Lambert Main Terminal Metrolink Station and Union Station in downtown St. Louis. Beyond these choices, travelers can also take a taxi or a rideshare vehicle after cheap flights from Denver to St. Louis. There are plenty of large rental car chains available at the airport if you prefer to drive downtown.

Which cities can you get to from St. Louis?

The airport in St. Louis not only makes a great destination for people traveling to the city center, but it is also a good airport for those traveling to communities that surround St. Louis, including Chesterfield, Washington, Bloomsdale, Collinsville, Edwardsville, Belleville, Alton, Saint Charles, Jerseyville, Winfield, New Haven, and O'Fallon.


Alternative routes for Denver to St. Louis

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Denver to Kansas City Flights
Fastest flight time1h 38m
Cheapest price$103
Denver to Springfield Flights
Fastest flight time1h 55m
Cheapest price$226
Colorado Springs to Springfield Flights
Fastest flight time4h 56m
Cheapest price$218
Colorado Springs to St. Louis Flights
Fastest flight time4h 48m
Cheapest price$255
Colorado Springs to Kansas City Flights
Fastest flight time3h 54m
Cheapest price$179
Grand Junction to St. Louis Flights
Fastest flight time4h 53m
Cheapest price$456
Denver to Columbia, Missouri Flights
Fastest flight time4h 30m
Cheapest price$450
Montrose, Colorado to Kansas City Flights
Fastest flight time4h 41m
Cheapest price$352
Grand Junction to Kansas City Flights
Fastest flight time4h 24m
Cheapest price$342
Denver to Joplin Flights
Fastest flight time1h 44m
Cheapest price$269
Aspen to Kansas City Flights
Fastest flight time5h 00m
Cheapest price$545
Hayden, Colorado to Kansas City Flights
Fastest flight time6h 03m
Cheapest price$332

Similar Denver to St. Louis flights

Flexible with your destination? Broaden your search and find flights similar to your Denver to St. Louis route

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Denver to St. Louis. momondo saves you time and could save you money on your trip.

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

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

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

Once you have performed a search for Denver to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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 simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Denver and alert you when they change.


An easier way to manage your St. Louis trip

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