Need help booking?
Unpublished phone-only deals available
ALN to DCA: distance & flight time
Alton/St Louis (St Louis Regional Airport) → Washington (Ronald Reagan Washington National Airport)
699 mi
1,125 km · 608 nm
1h 59m
estimated nonstop flight time
—
time difference · heading east
See live ALN→DCA fares Phone-only fares on this route — call free
Flight time details
699 miles nonstop takes roughly 1h 59m 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
- ALN — St Louis Regional Airport · Alton/St Louis, United States
- DCA — Ronald Reagan Washington National Airport · Washington, 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 DCA
Frequently asked questions
How far is ALN from DCA?
The flight distance from Alton/St Louis (ALN) to Washington (DCA) is 699 miles (1,125 km, 608 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ALN to DCA?
A nonstop flight takes about 1h 59m 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 DCA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ALN–DCA that never appear on search engines, with no booking fees.