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UGN to ALN: distance & flight time
Chicago (Waukegan National Airport) → Alton/St Louis (St Louis Regional Airport)
269 mi
434 km · 234 nm
1h 11m
estimated nonstop flight time
—
time difference · heading southwest
See live UGN→ALN fares Phone-only fares on this route — call free
Flight time details
269 miles nonstop takes roughly 1h 11m gate to gate, flying southwest. 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
- UGN — Waukegan National Airport · Chicago, 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 UGN
- ORD · Chicago O'Hare International Airport31 mi away
- ENW · Kenosha Regional Airport12 mi away
- PWK · Chicago Executive Airport21 mi away
- RAC · John H Batten Airport24 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 UGN from ALN?
The flight distance from Chicago (UGN) to Alton/St Louis (ALN) is 269 miles (434 km, 234 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from UGN to ALN?
A nonstop flight takes about 1h 11m 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 UGN to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on UGN–ALN that never appear on search engines, with no booking fees.