Houston to St Louis

IAHSTL

Fly from Houston to St Louis starting at USD 90 with Frontier Airlines.Best fare available on Sep 19, 2026.Limited seats. Better plans. Book before it's gone.

Houston to St Louis cheapest flights this week

7 Jul
Frontier Airlines
11:12IAH
08:52STL
1 StopUSD 165VIEW DEAL
17 Sept
Frontier Airlines
20:44IAH
09:40STL
1 StopUSD 102VIEW DEAL
18 Sept
Frontier Airlines
13:35IAH
09:40STL
1 StopUSD 96VIEW DEAL
19 Sept
Frontier Airlines
20:44IAH
09:40STL
1 StopUSD 90VIEW DEAL
22 Sept
Frontier Airlines
20:44IAH
09:40STL
1 StopUSD 90VIEW DEAL

Houston to St Louis monthly flight fare trend

Jul
from USD 165
Aug
No flights
Sep
from USD 90
Oct
No flights
Nov
No flights
Dec
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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