Denver (DEN) to St Louis (STL)
Flight time
≈ 2h 20m
Bearing
91° E
Denver (DEN) to St Louis (STL) is 768 miles (1,236 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies DEN–STL
US DOT T-100 · filed dataIn April 2026, Southwest Airlines operated the most departures, one of 5 carriers flying nonstop DEN–STL; the Boeing 737 MAX 8 was the most common aircraft at 33% of departures; flights ran 76% full.
Departures
573
April 2026
Seats
93,833
both directions
Passengers
71,364
both directions
Load factor
76.0%
passengers ÷ seats
Who flies DEN–STL?
Southwest Airlines operated the most nonstop DEN–STL departures in April 2026 (371), one of 5 carriers on the route.
- WN
Southwest Airlines
371 departures · 62,531 seats
Share of departures64.7%72.9%
Load
- UA
United Airlines
161 departures · 23,122 seats
Share of departures28.1%85.4%
Load
- F9
Frontier Airlines
38 departures · 7,860 seats
Share of departures6.6%77.0%
Load
- OO
SkyWest Airlines
2 departures · 140 seats
Share of departures0.3%0.0%
Load
- GCA
Global Crossing Airlines
1 departures · 180 seats
Share of departures0.2%0.0%
Load
What plane flies DEN–STL?
In April 2026, the Boeing 737 MAX 8 flew 33% of DEN–STL departures — more than any other aircraft type.
- Boeing 737 MAX 8
191 departures · 73.6% load
33.3% - Boeing 737-800
173 departures · 75.3% load
30.2% - Airbus A319
85 departures · 86.1% load
14.8% - Boeing 737-700
63 departures · 77.0% load
11.0% - Airbus A320
19 departures · 70.0% load
3.3% - Airbus A320neo
18 departures · 85.6% load
3.1% - Airbus A321neo
12 departures · 68.5% load
2.1% - Airbus A321
6 departures · 69.9% load
1.1% - Boeing 737 MAX 9
4 departures · 97.2% load
0.7% - Embraer E175
2 departures · 0.0% load
0.4%
How has DEN–STL traffic changed?
Nonstop DEN–STL departures fell from 643 in May 2025 to 573 in April 2026.
Monthly nonstop DEN–STL traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
643 departures · 80,026 passengers
80.7%
Load
June 2025
679 departures · 88,969 passengers
84.0%
Load
July 2025
696 departures · 90,474 passengers
84.5%
Load
August 2025
655 departures · 84,314 passengers
81.3%
Load
September 2025
650 departures · 84,532 passengers
81.3%
Load
October 2025
667 departures · 86,363 passengers
80.1%
Load
November 2025
547 departures · 69,059 passengers
74.8%
Load
December 2025
533 departures · 65,718 passengers
73.7%
Load
January 2026
502 departures · 59,496 passengers
71.1%
Load
February 2026
502 departures · 57,758 passengers
69.8%
Load
March 2026
636 departures · 79,806 passengers
77.8%
Load
April 2026
573 departures · 71,364 passengers
76.0%
Load
By direction
The DOT files each direction separately — they rarely match.
DEN → STL
74.6% full
288 departures · 35,192 passengers
STL → DEN
77.5% full
285 departures · 36,172 passengers
Nonstop DEN–STL traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Frequently asked
How far is Denver (DEN) from St Louis (STL)?
DEN to STL is 768 miles (1,236 km / 667 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from DEN to STL?
A nonstop covers the 768-mile great-circle distance in roughly 2h 20m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies DEN–STL?
In April 2026, the Boeing 737 MAX 8 flew the largest share of departures (33.3%), followed by the Boeing 737-800 (30.2%).
What mileage do I earn flying DEN–STL?
Distance-based programs credit off the 768-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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