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STL to IAH: distance & flight time
St. Louis (St Louis Lambert International Airport) → Houston (George Bush Intercontinental Houston Airport)
668 mi
1,076 km · 581 nm
1h 55m
estimated nonstop flight time
Same time
time difference · heading southwest
See live STL→IAH fares Phone-only fares on this route — call free
Flight time details
668 miles nonstop takes roughly 1h 55m 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
- STL — St Louis Lambert International Airport · 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 STL
- SUS · Spirit of St Louis Airport16 mi away
- ALN · St Louis Regional Airport20 mi away
- BLV · Scott AFB/Midamerica Airport32 mi away
- SPI · Abraham Lincoln Capital Airport84 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 STL from IAH?
The flight distance from St. Louis (STL) to Houston (IAH) is 668 miles (1,076 km, 581 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STL to IAH?
A nonstop flight takes about 1h 55m 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 IAH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STL–IAH that never appear on search engines, with no booking fees.