Direct (nonstop) flights from Houston to Saint Louis
1 airline flys nonstop from George Bush Intcntl Houston (IAH) to Saint Louis Airport (STL). It's 667 miles (1,073 km), about 2h 9m in the air. Operated by United Airlines.
United Airlines
Route data last updated: May 28, 2026
Airlines with non-stop flights
Alternative Routes
Other ways to fly from Houston to Saint Louis with one stop · direct emits 123 kg CO₂ per passenger
Looking for the return flight?
STL → IAH: Flights from Saint Louis to HoustonOther direct flights from Houston
Direct flights from Saint Louis (STL)
Frequently Asked Questions
How long is the direct flight from Houston to Saint Louis?
A nonstop flight from Houston (IAH) to Saint Louis (STL) takes approximately 2 hours and 9 minutes. The distance is 667 miles (1,073 km).
Which airlines fly nonstop from Houston to Saint Louis?
Just United Airlines.
Is there a nonstop flight from Houston to Saint Louis?
Yes. 1 airline: United Airlines.
How far is Houston from Saint Louis?
The flight distance from Houston to Saint Louis 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 Houston to Saint Louis?
At 2h 9m, 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 Houston to Saint Louis?
Roughly 123 kg CO2 per passenger one-way. That's about the same as driving 615 km.
Is the return flight from Saint Louis to Houston 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 Houston to Saint Louis?
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 George Bush Intcntl Houston for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.