Houston to St Louis
IAHSTL
Fly from Houston to St Louis starting at USD 89 with Frontier Airlines.
Best fare available on Oct 1, 2026.
Limited seats. Better plans. Book before it's gone.
Houston to St Louis cheapest flights this week
Houston to St Louis monthly flight fare trend
Sep
No flights
Oct
from USD 89
Nov
from USD 120
Dec
No flights
Jan
No flights
Feb
No flights
Airport Details
Origin
Houston
George Bush Intercontinental Houston Airport (IAH)
Houston, IAH
Zone
Chicago
Elev
97 ft
Destination
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
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