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SFO to ALN: distance & flight time
San Francisco (San Francisco International Airport) → Alton/St Louis (St Louis Regional Airport)
1,747 mi
2,812 km · 1,518 nm
3h 54m
estimated nonstop flight time
—
time difference · heading east
See live SFO→ALN fares Phone-only fares on this route — call free
Flight time details
1,747 miles nonstop takes roughly 3h 54m 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
- SFO — San Francisco International Airport · San Francisco, 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 SFO
- SQL · San Carlos Airport10 mi away
- HAF · Half Moon Bay Airport10 mi away
- OAK · Metropolitan Oakland International Airport11 mi away
- NGZ · Alameda Naval Air Station12 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 SFO from ALN?
The flight distance from San Francisco (SFO) to Alton/St Louis (ALN) is 1,747 miles (2,812 km, 1,518 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SFO to ALN?
A nonstop flight takes about 3h 54m 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 SFO to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SFO–ALN that never appear on search engines, with no booking fees.