Cheap flights from St. Louis to Denver

Round-trip
1 adult
Economy
From?
To?
Tue 9/21
Tue 9/28

Travel Restriction Alert

The COVID-19 (coronavirus) outbreak may impact travel from Lambert-St Louis to Denver.
View current United States travel restrictions

Flight information for St. Louis to Denver
(STL to DEN)

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Denver
Best Price Found$78The best flight deal from St. Louis to Denver found on momondo in the last 72 hours is $78
Fastest flight time2h 20mThe fastest flight from St. Louis to Denver takes 2h 20m
Direct flightsNoneThere are no direct flights from St. Louis to Denver. Popular non-direct route for this connection is Lambert-St Louis Airport - Denver Intl Airport.
Airports in Denver2 airportsThere are 2 airports near Denver: Denver Arapahoe Co (APA), Denver Intl (DEN)

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?

September

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

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

Wednesday

The cheapest day of the week is typically Wednesday. 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 41% more expensive in the afternoon than in the evening

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

Frontier

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

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?

60 days before

The cheapest time to buy a flight from St. Louis to Denver is approximately 60 days to departure


Easily compare round-trip flights from St. Louis to Denver

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from St. Louis to Denver by changing tabs
Frontier
Oct 2
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Oct 8
DEN7:39 amDenver Intl
2h 07m
STL9:46 amLambert-St Louis
Frontier
Oct 6
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Oct 12
DEN3:15 amDenver Intl
2h 08m
STL5:23 amLambert-St Louis
Frontier
Oct 5
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Oct 6
DEN3:15 amDenver Intl
2h 08m
STL5:23 amLambert-St Louis
Frontier
Oct 2
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Oct 9
DEN7:39 amDenver Intl
2h 07m
STL9:46 amLambert-St Louis
Frontier
Oct 13
STL5:39 amLambert-St Louis
2h 36m
DEN8:15 amDenver Intl
Oct 16
DEN7:39 amDenver Intl
2h 07m
STL9:46 amLambert-St Louis
Frontier
Oct 2
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Oct 5
DEN3:15 amDenver Intl
2h 06m
STL5:21 amLambert-St Louis

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

If you're looking for one-way flights from St. Louis to Denver, view some of our deals below provided by Frontier, Spirit Airlines and United Airlines
Frontier
Sep 28
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Frontier
Sep 29
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Spirit Airlines
Sep 23
STL6:45 amLambert-St Louis
7h 58m
1 stop
DEN2:43 pmDenver Intl

Search last-minute flights to Denver from St. Louis

Find and compare flight prices for your last-minute flight from St. Louis to Denver
Frontier
Sep 25
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Sep 27
DEN3:15 amDenver Intl
2h 06m
STL5:21 amLambert-St Louis
Frontier
Sep 24
STL4:30 amLambert-St Louis
2h 28m
DEN6:58 amDenver Intl
Sep 28
DEN3:15 amDenver Intl
2h 06m
STL5:21 amLambert-St Louis
Frontier
Sep 22
STL5:39 amLambert-St Louis
2h 24m
DEN8:03 amDenver Intl
Sep 23
DEN6:19 amDenver Intl
2h 05m
STL8:24 amLambert-St Louis
Frontier
Sep 26
STL6:39 amLambert-St Louis
2h 21m
DEN9:00 amDenver Intl
Sep 29
DEN3:15 amDenver Intl
2h 06m
STL5:21 amLambert-St Louis
Frontier
Sep 24
STL4:30 amLambert-St Louis
2h 28m
DEN6:58 amDenver Intl
Sep 27
DEN3:15 amDenver Intl
2h 06m
STL5:21 amLambert-St Louis
Multiple Airlines
Sep 23
STL6:45 amLambert-St Louis
7h 58m
1 stop
DEN2:43 pmDenver Intl
Sep 28
DEN3:15 amDenver Intl
2h 06m
STL5:21 amLambert-St Louis

Best airlines flying from St. Louis to Denver

Compare and see reviews for airlines that fly from St. Louis to Denver with momondo
AirlineRatingFree CancellationPrice
Frontier
PriceFrom $57
Free Cancellation
Rating
6.1
6.4

Boarding

5.9

Comfort

7.0

Crew

4.9

Entertainment

5.1

Food

Reviews

Will not fly Frontier again. Bait and switch with initial ticket price and baggage fees at check in.

1 / 10
American Airlines
PriceFrom $57
Free Cancellation
Rating
7.2
7.4

Boarding

7.1

Comfort

7.8

Crew

7.1

Entertainment

6.8

Food

Reviews

Flight attendant for first class is definitely not a morning person. Oh and the WiFi DID NOT WORK!

1 / 10
Southwest
PriceFrom $69
Free Cancellation
Rating
8.2
8.3

Boarding

8.2

Comfort

8.6

Crew

7.3

Entertainment

7.6

Food

Reviews

12 hours later still haven’t left the airport

1 / 10
Delta
PriceFrom $77
Free Cancellation
Rating
8.3
8.3

Boarding

8.5

Comfort

8.4

Crew

8.1

Entertainment

8.1

Food

Reviews

Great

1 / 10
United Airlines
PriceFrom $97
Free Cancellation
Rating
6.8
7.2

Boarding

6.6

Comfort

7.5

Crew

6.6

Entertainment

6.1

Food

Reviews

Not because the flight is going to Africa we can’t get better service on board

1 / 10

  • Are airlines flying from Lambert-St Louis to Denver Intl offering flexible cancellation due to COVID-19?

    Due to the global impact of COVID-19, some of our airline partners operating flights from Lambert-St Louis to Denver Intl, such as Frontier, United Airlines, and American Airlines may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.

  • 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 24m by plane in normal conditions.


Can I fly to Denver Intl from Lambert-St Louis right now?

Information is based on travel restrictions for travel to Denver Intl within the United States

Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter Denver Intl.

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Denver Intl.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Denver Intl.

Can I fly back to Lambert-St Louis from Denver Intl?

Returning to Lambert-St Louis from Denver Intl

COVID-19 testing requirements
Visitors from Denver Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Lambert-St Louis.

Quarantine requirements
Visitors from Denver Intl are not required to quarantine after entering Lambert-St Louis.

If you are planning to travel to Denver at this time, it is recommended that you stay up to date on current restrictions and follow proper safety measures while in public.

Alternative routes for St. Louis to Denver

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Kansas City to Denver Flights
Fastest flight time1h 52m
Cheapest price$58
Kansas City to Colorado Springs Flights
Fastest flight time3h 58m
Cheapest price$181
St. Louis to Colorado Springs Flights
Fastest flight time4h 02m
Cheapest price$181
Joplin to Denver Flights
Fastest flight time2h 10m
Cheapest price$223