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ALN to DCU: distance & flight time
Alton/St Louis (St Louis Regional Airport) → Decatur (Pryor Field Regional Airport)
339 mi
546 km · 295 nm
1h 22m
estimated nonstop flight time
—
time difference · heading southeast
See live ALN→DCU fares Phone-only fares on this route — call free
Flight time details
339 miles nonstop takes roughly 1h 22m gate to gate, flying southeast. 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
- ALN — St Louis Regional Airport · Alton/St Louis, United States
- DCU — Pryor Field Regional Airport · Decatur, 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 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
Near DCU
- HSV · Huntsville International Carl T Jones Field10 mi away
- HUA · Redstone Army Air Field15 mi away
- MSL · Northwest Alabama Regional Airport38 mi away
- GAD · Northeast Alabama Regional Airport68 mi away
Frequently asked questions
How far is ALN from DCU?
The flight distance from Alton/St Louis (ALN) to Decatur (DCU) is 339 miles (546 km, 295 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ALN to DCU?
A nonstop flight takes about 1h 22m 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 ALN to DCU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ALN–DCU that never appear on search engines, with no booking fees.