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
Filed traffic dataIn May 2026, Southwest Airlines operated the most departures, one of 4 carriers flying nonstop DEN–STL; the Boeing 737-800 was the most common aircraft at 38% of departures; flights ran 80% full.
Departures
624
May 2026
Seats
104,347
both directions
Passengers
82,976
both directions
Load factor
79.5%
RPM ÷ ASM
Who flies DEN–STL?
Southwest Airlines operated the most nonstop DEN–STL departures in May 2026 (379), one of 4 carriers on the route.
- WN
379 departures · 63,969 seats
Share of departures60.7%78.0%
Load
- UA
194 departures · 30,932 seats
Share of departures31.1%82.0%
Load
- F9
50 departures · 9,376 seats
Share of departures8.0%81.5%
Load
- OO
1 departures · 70 seats
Share of departures0.2%100.0%
Load
What plane flies DEN–STL?
In May 2026, the Boeing 737-800 flew 38% of DEN–STL departures — more than any other aircraft type.
- Boeing 737-800
240 departures · 81.2% load
38.5% - Boeing 737 MAX 8
225 departures · 75.9% load
36.1% - Boeing 737-700
62 departures · 83.3% load
9.9% - Airbus A320neo
38 departures · 82.1% load
6.1% - Airbus A319
32 departures · 89.6% load
5.1% - Airbus A320
8 departures · 75.7% load
1.3% - Airbus A321neo
8 departures · 86.6% load
1.3% - Boeing 737-900ER
4 departures · 66.8% load
0.6% - Boeing 737 MAX 9
4 departures · 70.4% load
0.6% - Airbus A321
2 departures · 62.8% load
0.3% - Embraer E175
1 departures · 100.0% load
0.2%
How has DEN–STL traffic changed?
Nonstop DEN–STL departures fell from 679 in June 2025 to 624 in May 2026.
Monthly nonstop DEN–STL traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
May 2026
624 departures · 82,976 passengers
79.5%
Load
By direction
Each direction is filed separately — they rarely match.
DEN → STL
76.7% full
314 departures · 40,119 passengers
STL → DEN
82.4% full
310 departures · 42,857 passengers
Nonstop DEN–STL traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
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 May 2026, the Boeing 737-800 flew the largest share of departures (38.5%), followed by the Boeing 737 MAX 8 (36.1%).
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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