Cheap flights from Houston to St. Louis
668 mi · 45m average nonstop
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Quick answer: Houston to St. Louis at a glance
Cheap flights from Houston (IAH) to St. Louis (STL) cover 668 miles (1,074 km) in about 45m nonstop, with 1 airline flying direct — a medium-haul domestic route. Search Kayak for today's cheapest live fare. Route difficulty 3/10.
Summary computed from real OpenFlights coordinates — not an estimate. Prices update live on Kayak.
Flying from Houston to St. Louis covers 668 miles (1,075 km) in approximately 0 hour 45 minutes. 1 airline offers direct flights on this medium-haul domestic route. This is a medium-haul domestic route typically served by direct flights.
Nonstop distance 668 miles. Direct carriers include UA.
We don't track historical prices for this route yet. Search live fares on Kayak for today's best price across 100+ airlines and booking sites.
Airlines on this route
1 airlines fly Houston → St. Louis. All are direct routes.
| Airline | Route type |
|---|---|
| UA | Direct |
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Houston to St. Louis — quick answers
How far is Houston from St. Louis by plane?
The nonstop flight distance from Houston (IAH) to St. Louis (STL) is 668 miles (1,074 km), calculated as a great-circle line from published OpenFlights airport coordinates. Actual flown distance is slightly longer due to airways and winds.
How long is the flight from Houston to St. Louis?
The average nonstop flight time from IAH to STL is 45 minutes. Gate-to-gate time is usually 20–35 minutes longer; connecting itineraries add 1–4 hours depending on the layover.
Which airlines fly from Houston to St. Louis?
1 airlines serve this route nonstop: UA. Schedules and amenities differ by carrier — compare live frequencies and fare classes on Kayak before you book.