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STL to ALN: distance & flight time

St. Louis (St Louis Lambert International Airport) → Alton/St Louis (St Louis Regional Airport)

20 mi
32 km · 17 nm
31m
estimated nonstop flight time
—
time difference · heading northeast
See live STL→ALN fares Phone-only fares on this route — call free

Flight time details

20 miles nonstop takes roughly 31m 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.

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The two airports

Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.

Alternate airports can cut this fare

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Frequently asked questions

How far is STL from ALN?

The flight distance from St. Louis (STL) to Alton/St Louis (ALN) is 20 miles (32 km, 17 nautical miles), measured along the great-circle route airlines actually fly.

How long is the flight from STL to ALN?

A nonstop flight takes about 31m 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 STL to ALN?

Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STL–ALN that never appear on search engines, with no booking fees.
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