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SDM to ALN: distance & flight time
San Diego (Brown Field Municipal Airport) → Alton/St Louis (St Louis Regional Airport)
1,566 mi
2,520 km · 1,361 nm
3h 32m
estimated nonstop flight time
—
time difference · heading northeast
See live SDM→ALN fares Phone-only fares on this route — call free
Flight time details
1,566 miles nonstop takes roughly 3h 32m 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
- SDM — Brown Field Municipal Airport · San Diego, 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 SDM
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 SDM from ALN?
The flight distance from San Diego (SDM) to Alton/St Louis (ALN) is 1,566 miles (2,520 km, 1,361 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SDM to ALN?
A nonstop flight takes about 3h 32m 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 SDM to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SDM–ALN that never appear on search engines, with no booking fees.