Saint Louis (STL) to Houston (IAH) flights
One airline flies nonstop from Saint Louis (STL) to Houston (IAH): United Airlines. The two airports are 668 miles (1,075 km) apart. United Airlines is in Star Alliance. There are also 19 ways to fly it with one stop, through Dallas, Austin and Kansas City and more.
Airlines flying nonstop from STL to IAH
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book STL to IAH with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Air Canada AeroplanBooks United Airlines
- Air New Zealand AirpointsBooks United Airlines
- ANA Mileage ClubBooks United Airlines
- Avianca LifeMilesBooks United Airlines
- Emirates SkywardsBooks United Airlines
- EVA Air Infinity MileageLandsBooks United Airlines
- JetBlue TrueBlueBooks United Airlines
- Lufthansa Miles & MoreBooks United Airlines
- Singapore Airlines KrisFlyerBooks United Airlines
- TAP Miles&GoBooks United Airlines
- Thai Royal Orchid PlusBooks United Airlines
- Turkish Airlines Miles&SmilesBooks United Airlines
- United MileagePlusBooks United Airlines
STL to IAH with one stop
19 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Dallas (DFW)American Airlines the whole way
- Via Austin (AUS)Southwest Airlines, then United Airlines
- Via Kansas City (MCI)Southwest Airlines, then United Airlines
- Via New Orleans (MSY)Southwest Airlines, then United Airlines
- Via Nashville (BNA)Southwest Airlines, then United Airlines
- Via San Antonio (SAT)Southwest Airlines, then United Airlines
- Via Pensacola (PNS)Southwest Airlines, then United Airlines
- Via Omaha (OMA)Southwest Airlines, then United Airlines
- Via Atlanta (ATL)Delta Air Lines and Frontier Airlines the whole way
- Via Chicago (ORD)American Airlines and United Airlines the whole way
- Via Panama City (ECP)Southwest Airlines, then United Airlines
- Via Milwaukee (MKE)Southwest Airlines, then United Airlines
- Via Columbus (CMH)Southwest Airlines, then United Airlines
- Via Minneapolis (MSP)Delta Air Lines the whole way
- Via Charlotte (CLT)American Airlines the whole way
STL to IAH: common questions
Which airlines fly nonstop from STL to IAH?
United Airlines (Star Alliance) flies nonstop from Saint Louis (STL) to Houston (IAH).
How far is Saint Louis from Houston by plane?
Saint Louis (STL) and Houston (IAH) are 668 miles (1,075 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book STL to IAH award flights?
13 programs can book at least one of the nonstop airlines: Air Canada Aeroplan, Air New Zealand Airpoints, ANA Mileage Club, Avianca LifeMiles, Emirates Skywards, EVA Air Infinity MileageLands, JetBlue TrueBlue, Lufthansa Miles & More and 5 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does STL to IAH cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for STL to IAH with taxes and fees.
Where can I connect between Saint Louis and Houston?
The most direct connections are through Dallas (DFW), Austin (AUS), Kansas City (MCI), New Orleans (MSY) and Nashville (BNA). On 6 of them the same airline flies both flights, for example American Airlines through Dallas.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.