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DEN to ALN: distance & flight time
Denver (Denver International Airport) → Alton/St Louis (St Louis Regional Airport)
783 mi
1,260 km · 681 nm
2h 10m
estimated nonstop flight time
—
time difference · heading east
See live DEN→ALN fares Phone-only fares on this route — call free
Flight time details
783 miles nonstop takes roughly 2h 10m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- DEN — Denver International Airport · Denver, United States
- ALN — St Louis Regional Airport · Alton/St Louis, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near DEN
- BFK · Buckley Air Force Base12 mi away
- APA · Centennial Airport22 mi away
- BJC · Rocky Mountain Metropolitan Airport24 mi away
- WBU · Boulder Municipal Airport32 mi away
Near ALN
- STL · St Louis Lambert International Airport20 mi away
- BLV · Scott AFB/Midamerica Airport26 mi away
- SUS · Spirit of St Louis Airport36 mi away
- SPI · Abraham Lincoln Capital Airport69 mi away
Frequently asked questions
How far is DEN from ALN?
The flight distance from Denver (DEN) to Alton/St Louis (ALN) is 783 miles (1,260 km, 681 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DEN to ALN?
A nonstop flight takes about 2h 10m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the cheapest way to fly from DEN to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DEN–ALN that never appear on search engines, with no booking fees.