Denver (DEN) to St Louis (STL)

768mi
1,236 km667 nm

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.

Route map: DEN → STLDENSTL

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What actually flies DENSTL

Filed traffic data

In 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.

What plane flies DEN–STL?

In May 2026, the Boeing 737-800 flew 38% of DEN–STL departures — more than any other aircraft type.

How has DEN–STL traffic changed?

Nonstop DEN–STL departures fell from 679 in June 2025 to 624 in May 2026.

Monthly nonstop DENSTL 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.

DENSTL

76.7% full

314 departures · 40,119 passengers

STLDEN

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

DEN

US

Denver International Airport

Coordinates

39.86°N, 104.67°W

Hemisphere

N · W

STL

US

St. Louis Lambert International Airport

Coordinates

38.75°N, 90.37°W

Hemisphere

N · W

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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