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Cheap flights from St Louis to Denver

30 nonstop flights a week, 4 of them today. Operated by 3 airlines, about 2h 25m in the air, 795 mi (1,279 km). Tickets from $100, nonstop from $151.

Flights from St Louis to Denver

Pick a departure date to see flights and seller prices

We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.

Prices by day: St Louis to Denver

Lowest one-way price in dollars from recent searches, cheap days in green. Press a day to see flights and exact prices.

Filters

Best fares from St Louis to Denver

Lowest one-way prices found by recent searches for the next 120 days; press a card to search that date

Cheapest one-way $100 28 November 2026, with a connection Cheapest nonstop $151 28 November 2026, Southwest Airlines Cheapest in the next 7 days $141 14 November, Sat Cheapest weekend departure $100 Sat, 28 November 2026 Cheapest month November 2026 tickets from $100

St Louis to Denver at a glance

flight time, from 2h 15m to 4h 30m
2h 25m
straight-line distance
795 mi (1,279 km)
flights a week
30
flights today
4
first and last departure
06:05 - 12:30
lowest price, with a connection, 28 November
$100
lowest nonstop price
$151
airlines
3

St Louis to Denver flight schedule

30 flights a week, 4 today, 67 seasonal or one-off. Departure and arrival times are local.

FlightDepartsArrivesDurationDaysAircraft
WN 4140
Southwest Airlines
06:05 Lambert-St. Louis International, terminal 2
07:30 Denver International
2h 25m
Sat
Boeing 737
WN 4140
Southwest Airlines
06:10 Lambert-St. Louis International, terminal 2
07:40 Denver International
2h 30m
Mon, Thu, Fri, Sun
Boeing 737-800
WN 4140
Southwest Airlines
06:30 Lambert-St. Louis International, terminal 2
07:55 Denver International
2h 25m
Mon, Tue, Wed, Thu
Boeing 737
WN 4140
Southwest Airlines
06:35 Lambert-St. Louis International, terminal 2
08:00 Denver International
2h 25m
Sat
Boeing 737-800
WN 4141
Southwest Airlines
08:05 Lambert-St. Louis International, terminal 2
09:30 Denver International
2h 25m
Sat
Boeing 737
WN 1755
Southwest Airlines
08:25 Lambert-St. Louis International, terminal 2
09:45 Denver International
2h 20m
Mon, Tue, Wed, Thu
WN 4141
Southwest Airlines
08:25 Lambert-St. Louis International, terminal 2
09:50 Denver International
2h 25m
Mon, Thu, Fri, Sun
Boeing 737
UA 1352
United Airlines
08:40 Lambert-St. Louis International, terminal 1
10:11 Denver International
2h 31m
Mon
Boeing 737-900
UA 1352
United Airlines
08:50 Lambert-St. Louis International, terminal 1
10:21 Denver International
2h 31m
Tue, Wed, Thu, Fri, Sat, Sun
Boeing 737-800
WN 4141
Southwest Airlines
08:55 Lambert-St. Louis International, terminal 2
10:20 Denver International
2h 25m
Sat
Boeing 737-800
WN 1808
Southwest Airlines
11:20 Lambert-St. Louis International, terminal 2
12:45 Denver International
2h 25m
Mon, Tue, Wed, Thu
Boeing 737-800
F9 4567
Frontier Airlines
11:40 Lambert-St. Louis International, terminal 1
13:12 Denver International
2h 32m
Thu
Airbus A320
WN 1808
Southwest Airlines
12:30 Lambert-St. Louis International, terminal 2
13:55 Denver International
2h 25m
Mon, Thu, Fri, Sun
Boeing 737

Seasonal and one-off flights

Not operating in the next two weeks. The first of them is on 24 November.

FlightDepartsArrivesDurationDaysAircraft
WN 4140
Southwest Airlines
06:15 Lambert-St. Louis International, terminal 2
07:40 Denver International
2h 25m
Seasonal
Boeing 737
WN 4141
Southwest Airlines
08:20 Lambert-St. Louis International, terminal 2
09:45 Denver International
2h 25m
Seasonal
Boeing 737
WN 1808
Southwest Airlines
12:20 Lambert-St. Louis International, terminal 2
13:40 Denver International
2h 20m
Seasonal
WN 4140
Southwest Airlines
05:30 Lambert-St. Louis International, terminal 2
06:55 Denver International
2h 25m
Seasonal
Boeing 737
WN 4141
Southwest Airlines
07:45 Lambert-St. Louis International, terminal 2
09:10 Denver International
2h 25m
Seasonal
Boeing 737
WN 1808
Southwest Airlines
09:40 Lambert-St. Louis International, terminal 2
11:00 Denver International
2h 20m
Seasonal
Boeing 737
WN 4140
Southwest Airlines
05:40 Lambert-St. Louis International, terminal 2
07:05 Denver International
2h 25m
Seasonal
Boeing 737
WN 4141
Southwest Airlines
09:35 Lambert-St. Louis International, terminal 2
10:55 Denver International
2h 20m
Seasonal
Boeing 737-800
WN 2651
Southwest Airlines
11:35 Lambert-St. Louis International, terminal 2
15:05 Denver International
4h 30m
Seasonal
WN 1675
Southwest Airlines
12:00 Lambert-St. Louis International, terminal 2
13:25 Denver International
2h 25m
Seasonal
Boeing 737
UA 1605
United Airlines
08:40 Lambert-St. Louis International, terminal 1
10:11 Denver International
2h 31m
Seasonal
Boeing 737-900
UA 2459
United Airlines
08:48 Lambert-St. Louis International, terminal 1
10:25 Denver International
2h 37m
Seasonal
Boeing 737-900
UA 2459
United Airlines
08:52 Lambert-St. Louis International, terminal 1
10:26 Denver International
2h 34m
Seasonal
Boeing 737-900
WN 3785
Southwest Airlines
06:35 Lambert-St. Louis International, terminal 2
08:00 Denver International
2h 25m
Seasonal
Boeing 737-800
WN 3786
Southwest Airlines
08:35 Lambert-St. Louis International, terminal 2
10:00 Denver International
2h 25m
Seasonal
Boeing 737
WN 3785
Southwest Airlines
06:20 Lambert-St. Louis International, terminal 2
07:45 Denver International
2h 25m
Seasonal
Boeing 737
WN 3787
Southwest Airlines
10:20 Lambert-St. Louis International, terminal 2
11:50 Denver International
2h 30m
Seasonal
Boeing 737
WN 3785
Southwest Airlines
05:55 Lambert-St. Louis International, terminal 2
07:20 Denver International
2h 25m
Seasonal
Boeing 737
WN 3786
Southwest Airlines
08:30 Lambert-St. Louis International, terminal 2
09:55 Denver International
2h 25m
Seasonal
Boeing 737
WN 3787
Southwest Airlines
11:30 Lambert-St. Louis International, terminal 2
12:50 Denver International
2h 20m
Seasonal
Boeing 737
WN 343
Southwest Airlines
08:20 Lambert-St. Louis International, terminal 2
09:45 Denver International
2h 25m
Seasonal
Boeing 737-800
WN 654
Southwest Airlines
08:25 Lambert-St. Louis International, terminal 2
11:15 Denver International
3h 50m
Seasonal
Boeing 737
UA 2167
United Airlines
08:50 Lambert-St. Louis International, terminal 1
10:25 Denver International
2h 35m
Seasonal
Airbus A319
WN 3787
Southwest Airlines
09:40 Lambert-St. Louis International, terminal 2
11:10 Denver International
2h 30m
Seasonal
Boeing 737
WN 3785
Southwest Airlines
06:15 Lambert-St. Louis International, terminal 2
07:40 Denver International
2h 25m
Seasonal
Boeing 737
WN 343
Southwest Airlines
08:40 Lambert-St. Louis International, terminal 2
10:05 Denver International
2h 25m
Seasonal
WN 204
Southwest Airlines
12:20 Lambert-St. Louis International, terminal 2
13:40 Denver International
2h 20m
Seasonal
UA 2167
United Airlines
09:13 Lambert-St. Louis International, terminal 1
10:35 Denver International
2h 22m
Seasonal
Boeing 737-800
WN 4110
Southwest Airlines
06:10 Lambert-St. Louis International, terminal 2
07:35 Denver International
2h 25m
Seasonal
Boeing 737
WN 3535
Southwest Airlines
08:35 Lambert-St. Louis International, terminal 2
10:00 Denver International
2h 25m
Seasonal
Boeing 737-800
WN 4112
Southwest Airlines
11:15 Lambert-St. Louis International, terminal 2
12:35 Denver International
2h 20m
Seasonal
Boeing 737
WN 4110
Southwest Airlines
06:20 Lambert-St. Louis International, terminal 2
07:45 Denver International
2h 25m
Seasonal
Boeing 737
WN 3535
Southwest Airlines
09:05 Lambert-St. Louis International, terminal 2
10:30 Denver International
2h 25m
Seasonal
Boeing 737-800
WN 3812
Southwest Airlines
12:20 Lambert-St. Louis International, terminal 2
13:40 Denver International
2h 20m
Seasonal
WN 4110
Southwest Airlines
06:15 Lambert-St. Louis International, terminal 2
07:40 Denver International
2h 25m
Seasonal
Boeing 737
WN 2239
Southwest Airlines
08:20 Lambert-St. Louis International, terminal 2
10:55 Denver International
3h 35m
Seasonal
Boeing 737
WN 3535
Southwest Airlines
08:25 Lambert-St. Louis International, terminal 2
09:50 Denver International
2h 25m
Seasonal
WN 4697
Southwest Airlines
11:20 Lambert-St. Louis International, terminal 2
12:40 Denver International
2h 20m
Seasonal
Boeing 737-800
WN 3535
Southwest Airlines
08:50 Lambert-St. Louis International, terminal 2
10:15 Denver International
2h 25m
Seasonal
WN 4112
Southwest Airlines
11:25 Lambert-St. Louis International, terminal 2
12:45 Denver International
2h 20m
Seasonal
Boeing 737
WN 4041
Southwest Airlines
06:10 Lambert-St. Louis International, terminal 2
07:30 Denver International
2h 20m
Seasonal
Boeing 737
WN 4042
Southwest Airlines
08:30 Lambert-St. Louis International, terminal 2
09:55 Denver International
2h 25m
Seasonal
Boeing 737
WN 2084
Southwest Airlines
10:20 Lambert-St. Louis International, terminal 2
11:40 Denver International
2h 20m
Seasonal
Boeing 737-800
WN 4044
Southwest Airlines
12:30 Lambert-St. Louis International, terminal 2
13:50 Denver International
2h 20m
Seasonal
Boeing 737
WN 4041
Southwest Airlines
06:20 Lambert-St. Louis International, terminal 2
07:40 Denver International
2h 20m
Seasonal
Boeing 737
WN 4319
Southwest Airlines
08:20 Lambert-St. Louis International, terminal 2
11:00 Denver International
3h 40m
Seasonal
Boeing 737-800
WN 4042
Southwest Airlines
08:35 Lambert-St. Louis International, terminal 2
09:55 Denver International
2h 20m
Seasonal
WN 4043
Southwest Airlines
11:20 Lambert-St. Louis International, terminal 2
12:40 Denver International
2h 20m
Seasonal
Boeing 737-800
WN 4041
Southwest Airlines
06:00 Lambert-St. Louis International, terminal 2
07:20 Denver International
2h 20m
Seasonal
Boeing 737
WN 1663
Southwest Airlines
10:15 Lambert-St. Louis International, terminal 2
12:50 Denver International
3h 35m
Seasonal
WN 660
Southwest Airlines
10:15 Lambert-St. Louis International, terminal 2
13:35 Denver International
4h 20m
Seasonal
WN 4043
Southwest Airlines
10:55 Lambert-St. Louis International, terminal 2
12:15 Denver International
2h 20m
Seasonal
Boeing 737
WN 4041
Southwest Airlines
06:25 Lambert-St. Louis International, terminal 2
07:45 Denver International
2h 20m
Seasonal
Boeing 737
WN 4042
Southwest Airlines
08:20 Lambert-St. Louis International, terminal 2
09:50 Denver International
2h 30m
Seasonal
Boeing 737
WN 4043
Southwest Airlines
10:05 Lambert-St. Louis International, terminal 2
11:25 Denver International
2h 20m
Seasonal
Boeing 737
WN 3901
Southwest Airlines
05:40 Lambert-St. Louis International, terminal 2
06:55 Denver International
2h 15m
Seasonal
Boeing 737
WN 3902
Southwest Airlines
08:05 Lambert-St. Louis International, terminal 2
09:25 Denver International
2h 20m
Seasonal
Boeing 737
WN 4449
Southwest Airlines
11:10 Lambert-St. Louis International, terminal 2
12:25 Denver International
2h 15m
Seasonal
WN 3502
Southwest Airlines
05:50 Lambert-St. Louis International, terminal 2
07:05 Denver International
2h 15m
Seasonal
Boeing 737
WN 3503
Southwest Airlines
08:15 Lambert-St. Louis International, terminal 2
09:35 Denver International
2h 20m
Seasonal
Boeing 737
WN 3903
Southwest Airlines
12:45 Lambert-St. Louis International, terminal 2
14:00 Denver International
2h 15m
Seasonal
Boeing 737
WN 3901
Southwest Airlines
05:15 Lambert-St. Louis International, terminal 2
06:30 Denver International
2h 15m
Seasonal
WN 901
Southwest Airlines
06:20 Lambert-St. Louis International, terminal 2
07:35 Denver International
2h 15m
Seasonal
Boeing 737
WN 4449
Southwest Airlines
08:20 Lambert-St. Louis International, terminal 2
09:40 Denver International
2h 20m
Seasonal
Boeing 737
WN 3901
Southwest Airlines
06:10 Lambert-St. Louis International, terminal 2
07:25 Denver International
2h 15m
Seasonal
Boeing 737
WN 3902
Southwest Airlines
08:15 Lambert-St. Louis International, terminal 2
09:35 Denver International
2h 20m
Seasonal
Boeing 737
WN 4449
Southwest Airlines
11:05 Lambert-St. Louis International, terminal 2
12:20 Denver International
2h 15m
Seasonal
Boeing 737

Days of the week are taken from the schedule for the next 14 days; schedules change by season. Denver is 1 hour behind St Louis. The search shows seat availability and the price for your date.

Airlines flying St Louis to Denver

Flights a week by schedule and the cheapest nonstop fare of each airline found by recent searches

Southwest Airlines22 a week United Airlines7 a week Frontier Airlines1 a week

Airports

Where flights from St Louis to Denver depart and land

Departure from St Louis

Lambert-St. Louis International STL

30 flights a week, terminals 1, 2, 12 mi (19 km) from the city centre

About the airport

Arrival in Denver

Denver International DEN

30 flights a week, 18 mi (29 km) from the city centre

About the airport

Frequently asked questions

How long is the flight from St Louis to Denver?
A nonstop flight takes 2 hours 25 minutes on average, from 2h 15m to 4h 30m depending on the flight.
How far is Denver from St Louis?
795 mi (1,279 km) in a straight line between the cities.
Which airlines fly nonstop from St Louis to Denver?
Southwest Airlines (22 a week), United Airlines (7 a week) and Frontier Airlines (1 a week).
How many flights a day are there from St Louis to Denver?
4 flights today and 30 a week, about 4.3 a day on average.
When are the first and last flights from St Louis to Denver?
The first departure is at 06:05 (WN4140), the last at 12:30 (WN1808). Local time.
What is the cheapest upcoming date to fly from St Louis to Denver?
28 November 2026 (Saturday): from $100 one way, with a connection, by recent searches. The search shows the price for your dates.
Which airline is the cheapest from St Louis to Denver?
Southwest Airlines: nonstop tickets from $151 on 28 November by recent searches. Prices change daily, so compare the sellers in the search.
What is the time difference between St Louis and Denver?
Denver is 1 hour behind St Louis. Schedule times on this page are local to each airport.
Which St Louis airport do flights to Denver leave from?
Lambert-St. Louis International (30 a week).