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SEP to ALN: distance & flight time
Stephenville (Stephenville Clark Regional Airport) → Alton/St Louis (St Louis Regional Airport)
649 mi
1,044 km · 564 nm
1h 53m
estimated nonstop flight time
—
time difference · heading northeast
See live SEP→ALN fares Phone-only fares on this route — call free
Flight time details
649 miles nonstop takes roughly 1h 53m gate to gate, flying northeast. 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
- SEP — Stephenville Clark Regional Airport · Stephenville, 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 SEP
- MWL · Mineral Wells Airport40 mi away
- DFW · Dallas Fort Worth International Airport81 mi away
- BKD · Stephens County Airport54 mi away
- FWH · NAS Fort Worth JRB/Carswell Field57 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 SEP from ALN?
The flight distance from Stephenville (SEP) to Alton/St Louis (ALN) is 649 miles (1,044 km, 564 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEP to ALN?
A nonstop flight takes about 1h 53m 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 SEP to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEP–ALN that never appear on search engines, with no booking fees.