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Cheap flights from St. Louis to Denver from $33

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 Denver departing on 2/15. 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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Find the cheapest flights from St. Louis to Denver

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Denver that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Denver.

Cheap last minute flights

Planning a quick getaway from St. Louis to Denver? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Denver, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Denver

Find recent round-trip train or bus tickets from St. Louis to Denver.

All round-trip flight deals to Denver

The cheapest plane tickets to Denver found on KAYAK recently.
6:46 pm - 8:22 pmSTL-DEN
2h 36mnonstop
5:05 am - 8:13 amDEN-STL
2h 08mnonstop
$67Frontier
Find Deal
Fri, Dec 13 - Wed, Jan 1
6:46 pm - 8:22 pmSTL-DEN
2h 36mnonstop
5:05 am - 8:13 amDEN-STL
2h 08mnonstop
$68Frontier
Find Deal
Wed, Dec 11 - Wed, Dec 18
8:27 am - 10:05 amSTL-DEN
2h 38mnonstop
9:40 am - 12:48 pmDEN-STL
2h 08mnonstop
$177United Airlines
Find Deal
Wed, Jan 15 - Sun, Jan 19
4:36 pm - 6:13 pmSTL-DEN
2h 37mnonstop
9:40 am - 12:48 pmDEN-STL
2h 08mnonstop
$197United Airlines
Find Deal
Sun, Jan 12 - Thu, Jan 16
5:10 pm - 6:40 pmSTL-DEN
2h 30mnonstop
9:50 am - 12:55 pmDEN-STL
2h 05mnonstop
$198Southwest
Find Deal
Sun, Feb 9 - Wed, Feb 12
2:25 pm - 6:50 pmSTL-DEN
5h 25m1 stop
6:29 pm - 1:05 amDEN-STL
5h 36m1 stop
$216Delta
Find Deal
Wed, Dec 11 - Wed, Dec 18
6:35 am - 8:00 amSTL-DEN
2h 25mnonstop
6:10 am - 9:20 amDEN-STL
2h 10mnonstop
$228Southwest
Find Deal
Thu, Dec 12 - Sun, Dec 15
6:00 am - 10:24 amSTL-DEN
5h 24m1 stop
6:29 pm - 12:57 amDEN-STL
5h 28m1 stop
$246Delta
Find Deal
Mon, Dec 16 - Mon, Dec 16
5:27 pm - 11:57 pmSTL-DEN
7h 30m1 stop
8:06 am - 2:52 pmDEN-STL
5h 46m1 stop
$262American Airlines
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Fri, Feb 14 - Tue, Feb 18
5:45 am - 10:14 amSTL-DEN
5h 29m1 stop
6:00 am - 12:56 pmDEN-STL
5h 56m1 stop
$266American Airlines
Find Deal
Sun, Dec 8 - Thu, Dec 12
6:53 pm - 8:24 pmSTL-DEN
2h 31mnonstop
$33Frontier
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Sat, Feb 15
9:46 pm - 11:26 pmSTL-DEN
2h 40mnonstop
$36Frontier
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Tue, Dec 17
8:27 am - 10:05 amSTL-DEN
2h 38mnonstop
$79United Airlines
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Tue, Jan 21
6:30 am - 12:27 pmSTL-DEN
6h 57m1 stop
$88United Airlines
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Tue, Jan 7
7:40 am - 3:20 pmSTL-DEN
8h 40m1 stop
$98Delta
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Sat, Jan 18
6:30 pm - 11:14 pmSTL-DEN
5h 44m1 stop
$108Delta
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Wed, Dec 11
5:10 pm - 6:40 pmSTL-DEN
2h 30mnonstop
$109Southwest
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Tue, Jan 21
10:25 pm - 11:55 pmSTL-DEN
2h 30mnonstop
$139Southwest
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Thu, Feb 13
7:04 am - 11:46 amSTL-DEN
5h 42m1 stop
$193American Airlines
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Wed, Dec 25
5:17 am - 1:57 pmSTL-DEN
9h 40m1 stop
$270American Airlines
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Thu, Nov 28
10:17 pm - 3:59 amSTL-DEN
6h 42m1 stop
9:03 pm - 12:06 amDEN-STL
2h 03mnonstop
$201Frontier
Find Deal
Sat, Nov 23 - Thu, Nov 28
5:38 pm - 7:06 pmSTL-DEN
2h 28mnonstop
9:03 pm - 12:06 amDEN-STL
2h 03mnonstop
$206Frontier
Find Deal
Sat, Nov 23 - Thu, Nov 28
2:10 pm - 4:31 pmSTL-DEN
27h 21m3 stops
7:10 pm - 4:26 pmDEN-STL
20h 16m2 stops
Sun, Nov 24 - Wed, Nov 27
1:00 pm - 5:31 pmSTL-DEN
29h 31m3 stops
7:10 pm - 4:26 pmDEN-STL
20h 16m2 stops
Mon, Nov 25 - Wed, Nov 27
7:55 am - 3:07 pmSTL-DEN
8h 12m1 stop
12:55 am - 9:09 amDEN-STL
7h 14m1 stop
$631Delta
Find Deal
Fri, Nov 22 - Tue, Nov 26
6:00 am - 11:36 amSTL-DEN
6h 36m1 stop
12:55 am - 9:09 amDEN-STL
7h 14m1 stop
$672Delta
Find Deal
Fri, Nov 22 - Tue, Nov 26
1:39 pm - 3:08 pmSTL-DEN
2h 29mnonstop
9:40 am - 12:43 pmDEN-STL
2h 03mnonstop
$677United Airlines
Find Deal
Sat, Nov 23 - Thu, Nov 28
8:05 am - 12:40 pmSTL-DEN
5h 35m1 stop
9:40 am - 12:43 pmDEN-STL
2h 03mnonstop
$687United Airlines
Find Deal
Sat, Nov 23 - Thu, Nov 28
7:00 am - 11:02 amSTL-DEN
29h 02m2 stops
9:40 pm - 1:27 pmDEN-STL
14h 47m1 stop
$862Alaska Airlines
Find Deal
Sat, Nov 23 - Wed, Nov 27
2:23 pm - 11:59 pmSTL-DEN
10h 36m1 stop
11:58 am - 11:59 pmDEN-STL
35h 01m2 stops
$875Alaska Airlines
Find Deal
Sat, Nov 23 - Thu, Nov 28
6:46 pm - 8:22 pmSTL-DEN
2h 36mnonstop
5:05 am - 8:13 amDEN-STL
2h 08mnonstop
$67Frontier
Find Deal
Fri, Dec 13 - Wed, Jan 1
6:46 pm - 8:22 pmSTL-DEN
2h 36mnonstop
5:05 am - 8:13 amDEN-STL
2h 08mnonstop
$68Frontier
Find Deal
Wed, Dec 11 - Wed, Dec 18
6:46 pm - 8:22 pmSTL-DEN
2h 36mnonstop
5:05 am - 8:13 amDEN-STL
2h 08mnonstop
$77Frontier
Find Deal
Mon, Dec 9 - Wed, Dec 11
6:53 pm - 8:24 pmSTL-DEN
2h 31mnonstop
6:00 am - 9:16 amDEN-STL
2h 16mnonstop
$78Frontier
Find Deal
Fri, Feb 21 - Sat, Mar 1
8:27 am - 10:05 amSTL-DEN
2h 38mnonstop
9:40 am - 12:48 pmDEN-STL
2h 08mnonstop
$177United Airlines
Find Deal
Wed, Jan 15 - Sun, Jan 19
4:36 pm - 6:13 pmSTL-DEN
2h 37mnonstop
9:40 am - 12:48 pmDEN-STL
2h 08mnonstop
$197United Airlines
Find Deal
Sun, Jan 12 - Thu, Jan 16
7:20 am - 8:55 amSTL-DEN
2h 35mnonstop
7:20 pm - 10:20 pmDEN-STL
2h 00mnonstop
$198Southwest
Find Deal
Thu, Jan 9 - Mon, Jan 13
5:10 pm - 6:40 pmSTL-DEN
2h 30mnonstop
6:45 am - 9:55 amDEN-STL
2h 10mnonstop
$208Southwest
Find Deal
Wed, Jan 29 - Sun, Feb 2
4:31 pm - 6:02 pmSTL-DEN
2h 31mnonstop
1:26 pm - 4:29 pmDEN-STL
2h 03mnonstop
$217United Airlines
Find Deal
Sat, Dec 7 - Tue, Dec 10
8:35 pm - 10:05 pmSTL-DEN
2h 30mnonstop
7:20 pm - 10:20 pmDEN-STL
2h 00mnonstop
$218Southwest
Find Deal
Mon, Jan 27 - Thu, Jan 30

Frontier flights from St. Louis to Denver

Our best Frontier deals on St. Louis to Denver flight tickets
Frontier
Dec 13
STL6:46 pmLambert-St Louis
2h 36m
DEN8:22 pmDenver Intl
Jan 1
DEN5:05 amDenver Intl
2h 08m
STL8:13 amLambert-St Louis
Frontier
Dec 11
STL6:46 pmLambert-St Louis
2h 36m
DEN8:22 pmDenver Intl
Dec 18
DEN5:05 amDenver Intl
2h 08m
STL8:13 amLambert-St Louis
Frontier
Dec 9
STL6:46 pmLambert-St Louis
2h 36m
DEN8:22 pmDenver Intl
Dec 11
DEN5:05 amDenver Intl
2h 08m
STL8:13 amLambert-St Louis

United Airlines flights from St. Louis to Denver

Our best United Airlines deals on St. Louis to Denver flight tickets
United Airlines
Jan 15
STL8:27 amLambert-St Louis
2h 38m
DEN10:05 amDenver Intl
Jan 19
DEN9:40 amDenver Intl
2h 08m
STL12:48 pmLambert-St Louis
United Airlines
Jan 12
STL4:36 pmLambert-St Louis
2h 37m
DEN6:13 pmDenver Intl
Jan 16
DEN9:40 amDenver Intl
2h 08m
STL12:48 pmLambert-St Louis
United Airlines
Jan 12
STL8:27 amLambert-St Louis
2h 38m
DEN10:05 amDenver Intl
Jan 16
DEN7:45 amDenver Intl
5h 29m
1 stop
STL2:14 pmLambert-St Louis

See travel insights to Denver from

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

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

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

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

Tuesday. The cheapest day of the week is typically Tuesday. The most expensive is typically Sunday

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

In the evening. St. Louis to Denver flights are approximately 64% more expensive at noon than in the evening

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

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

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

23 days before. The cheapest time to buy a flight from St. Louis to Denver is approximately 23 days to departure

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

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

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

As of November 2024, prices for St. Louis to Denver flights are approximately 17% 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 round-trip 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

$33

Fastest flight time

2h 24m

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 $33. The best round-trip flight deal from St. Louis to Denver found on momondo in the last 72 hours is $67.
The fastest flight from St. Louis to Denver takes 2h 24m
Direct flights go from St. Louis to Denver every day.
There is 1 airport near Denver: Denver Intl (DEN)

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

    The straight-line distance from Lambert-St Louis to Denver Intl is 794.2 mi. Typically, this will take 2h 25m by plane in normal conditions.

  • 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 were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. 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 necessary travel and health documents for your Denver Intl 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 is the most popular plane model from St. Louis to Denver?

  • What is the most popular airline from St. Louis to Denver?


Best airlines flying from St. Louis to Denver

Compare and see reviews for airlines that fly from St. Louis to Denver with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $45Free CancellationRating
6.1
3,539 reviews
Search Frontier flights
United AirlinesPriceFrom $151Free CancellationRating
7.4
9,173 reviews
Search United Airlines flights
SouthwestPriceFrom $158Free CancellationRating
8.1
5,015 reviews
Search Southwest flights
DeltaPriceFrom $175Free CancellationRating
8.0
8,759 reviews
Search Delta flights
American AirlinesPriceFrom $192Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
  • Southwest Flights From St. Louis to Denver

    The lowest priced Southwest flight from St. Louis to Denver from the last 72 hours was $158. Generally, Southwest has 28 flights on this route every week with an average price of $280. Southwest is rated 8.1/10 by our users.

  • United Airlines Flights From St. Louis to Denver

    Across 9,172 United Airlines reviews on momondo, the average score is 7.4/10. United Airlines flies from St. Louis to Denver about 16 times each week, with ticket deals ranging from $151 to $314. Price data is based on momondo searches in the last 72 hours.


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?

momondo does allow users to show only those flights to Denver from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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?

Of course. momondo tracks the price of St. Louis to Denver flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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