Direct (nonstop) flights from Saint Louis to Houston
1 airline flys nonstop from Saint Louis Airport (STL) to George Bush Intcntl Houston (IAH). It's 667 miles (1,073 km), about 2h 20m in the air. Operated by United Airlines.
United Airlines
Route data last updated: May 30, 2026
Airlines with non-stop flights
UA
United Airlines
Alternative Routes
Other ways to fly from Saint Louis to Houston with one stop · direct emits 123 kg CO₂ per passenger
Looking for the return flight?
IAH → STL: Flights from Houston to Saint LouisOther direct flights from Saint Louis
Direct flights from Houston (IAH)
Frequently Asked Questions
How long is the direct flight from Saint Louis to Houston?
A nonstop flight from Saint Louis (STL) to Houston (IAH) takes approximately 2 hours and 20 minutes. The distance is 667 miles (1,073 km).
Which airlines fly nonstop from Saint Louis to Houston?
Just United Airlines.
Is there a nonstop flight from Saint Louis to Houston?
Yes. 1 airline: United Airlines.
How far is Saint Louis from Houston?
The flight distance from Saint Louis to Houston is 667 miles (1,073 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as the length of Italy.
What type of aircraft flies from Saint Louis to Houston?
At 2h 20m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Saint Louis to Houston?
Roughly 123 kg CO2 per passenger one-way. That's about the same as driving 615 km.
Is the return flight from Houston to Saint Louis also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Saint Louis to Houston?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Saint Louis Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.