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ALN to IAH: distance & flight time
Alton/St Louis (St Louis Regional Airport) → Houston (George Bush Intercontinental Houston Airport)
685 mi
1,102 km · 595 nm
1h 57m
estimated nonstop flight time
—
time difference · heading southwest
See live ALN→IAH fares Phone-only fares on this route — call free
Flight time details
685 miles nonstop takes roughly 1h 57m 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
- ALN — St Louis Regional Airport · Alton/St Louis, United States
- IAH — George Bush Intercontinental Houston Airport · Houston, 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 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
Near IAH
- DWH · David Wayne Hooks Memorial Airport14 mi away
- IWS · West Houston Airport23 mi away
- AAP · Andrau Airpark23 mi away
- HOU · William P Hobby Airport24 mi away
Frequently asked questions
How far is ALN from IAH?
The flight distance from Alton/St Louis (ALN) to Houston (IAH) is 685 miles (1,102 km, 595 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ALN to IAH?
A nonstop flight takes about 1h 57m 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 ALN to IAH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ALN–IAH that never appear on search engines, with no booking fees.