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BWI to ALN: distance & flight time
Baltimore (Baltimore/Washington International Thurgood Marshall Airport) → Alton/St Louis (St Louis Regional Airport)
718 mi
1,155 km · 624 nm
2h 2m
estimated nonstop flight time
—
time difference · heading west
See live BWI→ALN fares Phone-only fares on this route — call free
Flight time details
718 miles nonstop takes roughly 2h 2m gate to gate, flying west. 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
- BWI — Baltimore/Washington International Thurgood Marshall Airport · Baltimore, 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 BWI
- DCA · Ronald Reagan Washington National Airport30 mi away
- IAD · Washington Dulles International Airport45 mi away
- FME · Tipton Airport8 mi away
- ANP · Lee Airport17 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 BWI from ALN?
The flight distance from Baltimore (BWI) to Alton/St Louis (ALN) is 718 miles (1,155 km, 624 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BWI to ALN?
A nonstop flight takes about 2h 2m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from BWI to ALN?
Nonstop service on BWI–ALN depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 2h 2m nonstop estimate.
What is the cheapest way to fly from BWI to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BWI–ALN that never appear on search engines, with no booking fees.
Why are some BWI to ALN fares phone-only?
Consolidator contracts let us sell certain BWI–ALN tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.