$34 Cheap flight deals from Fort Collins (DEN) to St. Louis (STL)

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This Weekend's Flight Deals from Fort Collins to St. Louis

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Oct 18 - Sat, Nov 1
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$271 Roundtrip, found 4 hours ago
$271
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Sat, Oct 18 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Nov 1, priced at $271 found 4 hours ago

Airfares from $34 One Way, $65 Round Trip from Fort Collins to St. Louis

Prices starting at $65 for return flights and $34 for one-way flights to St. Louis were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Nov 1 - Sat, Dec 6
DEN
Denver
STL
St. Louis
$65 Roundtrip, just found
$65
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Nov 1 from Denver to St. Louis, returning Sat, Dec 6, priced at $65 just found
Sat, Nov 1 - Mon, Nov 3
DEN
Denver
STL
St. Louis
$80 Roundtrip, found 2 hours ago
$80
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Nov 1 from Denver to St. Louis, returning Mon, Nov 3, priced at $80 found 2 hours ago
Mon, Nov 17 - Tue, Nov 18
DEN
Denver
STL
St. Louis
$90 Roundtrip, found 5 days ago
$90
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Mon, Nov 17 from Denver to St. Louis, returning Tue, Nov 18, priced at $90 found 5 days ago
Wed, Jan 7 - Fri, Jan 9
DEN
Denver
STL
St. Louis
$177 Roundtrip, found 2 days ago
$177
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Wed, Jan 7 from Denver to St. Louis, returning Fri, Jan 9, priced at $177 found 2 days ago
Wed, Jan 7 - Fri, Jan 9
DEN
Denver
STL
St. Louis
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago
Select United flight, departing Wed, Jan 7 from Denver to St. Louis, returning Fri, Jan 9, priced at $197 found 2 days ago

St. Louis economy flight packages

Price found within the past 48 hours. Click for updated prices.
The Wildwood Hotel
3.5-star property

The Wildwood Hotel

9.2/10 Wonderful! (1,581 reviews)

Nov 15 - Nov 17

2 night stay

Denver (DEN) to St. Louis (STL)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $377, price is now $232 per person
$232
per person
found 14 hours ago
Staff was friendly. While checking in I did not have to ask about my VIP benefits. Hotel has an old style charm to it. Hotel is located in a safe and quiet, sleepy kind of town. It’s a great hotel

Reviewed on Sep 2, 2025

Angad Arts Hotel St. Louis, Tapestry Collection by Hilton
4.0-star property

Angad Arts Hotel St. Louis, Tapestry Collection by Hilton

8.8/10 Excellent! (1,005 reviews)

Nov 21 - Nov 24

3 night stay

Denver (DEN) to St. Louis (STL)

Frontier Airlines • Roundtrip • Coach
Price was $468, price is now $344 per person
$344
per person
found 13 hours ago
This is a very unique, colorful & artistically interesting property! I would highly recommend and would definitely stay here again!

Reviewed on Sep 9, 2024

The Cheshire
4.0-star property

The Cheshire

8.6/10 Excellent! (1,003 reviews)

Nov 21 - Nov 24

3 night stay

Denver (DEN) to St. Louis (STL)

Frontier Airlines • Roundtrip • Coach
Price was $492, price is now $365 per person
$365
per person
found 13 hours ago
We always stay here when in St. Louis. Love the place. Nice atmosphere, great pub.

Reviewed on Sep 2, 2025

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More About Flying To St. Louis from Fort Collins

Route Information for Flights from Fort Collins to St. Louis

Origin Airport IATA Code
DEN
Destination Airport IATA Code
STL
Distance
Direct Flight Airlines
Earliest Flight Arrival
Latest Flight Arrival

Fort Collins to St. Louis

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Orbitz looks for the best deals on Fort Collins to St. Louis flights for you. Mix and match airlines for your departing and return flights to fit your travel schedule and budget.

Frequently asked questions

Are there non-stop flights from Fort Collins to St. Louis?
You'll find 3 airlines that fly nonstop from DIA airport to Lambert Field, so get ready to hit that "book" button. One of these carriers will have your ideal flight:

  • Southwest Airlines
  • United Airlines
  • Frontier Airlines

What is the shortest flight from Fort Collins to St. Louis?
It can zip by in as little as 1 hour and 55 minutes. If you're of the opinion that your vacation hours should be spent 'vacationing' rather than flying, you'll enjoy the journey from Fort Collins to St. Louis.
What airlines fly from Fort Collins to St. Louis most frequently?
Southwest Airlines (WN) is one of the carriers with the most flights from Denver, CO (DEN-Denver Intl.) to Lambert Field. It offers 160 flights on this route every month. Taking off on a vacation is one of life's greatest pleasures, and this airline will get you to your destination quickly and safely. United Airlines (UA) will also take you to your destination in comfort. Offering 121 flights every month between Fort Collins and St. Louis, it's another quality airline to look into.
What is the cheapest day of the week to fly?
Consider flying out early in the week to save on your airfare. Orbitz data from 2021 shows that Monday is the cheapest day to depart, followed by Tuesday. Saturday showed the highest average ticket prices likely because many travelers prefer to start their vacation on a weekend.
What is the cheapest month to fly?
We won't keep you guessing, according to Orbitz data from 2021, the cheapest month to fly is February. Perfect for those who need a weekend getaway, or just a break from it all in the shortest month of the year. Be aware that the most expensive time to fly is during the height of summer in July, and in the holiday month of December.*According to flight demand on Orbitz.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

More Destinations

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.