Nonstop flights from St. Louis to Houston

2 airlines fly from St. Louis (STL) to 2 Houston airports (IAH and HOU), with up to 10 flights a day.

STLIAH

Routes

2 airport pairs

When they leave

St. Louis time

5:15a9:00pFirst departure 5:15 AM, last 9:00 PM

Seven in the morning, 5:15 AM to 11:00 AM, then three in the afternoon, 12:15 PM to 3:05 PM, then five in the evening, 5:50 PM to 9:00 PM.

Every flight

Earliest first

5:15 AM→7:15 AMSTL to HOUSouthwest AirlinesBoeing 737 MAX 8Daily
6:15 AM→8:35 AMSTL to IAHUnited AirlinesAirbus A319 · 2h 20mDaily
8:20 AM→10:20 AMSTL to HOUSouthwest AirlinesBoeing 737-700Sun
8:30 AM→11:01 AMSTL to IAHUnited AirlinesCRJ 700 · 2h 31mDaily
8:40 AM→10:40 AMSTL to HOUSouthwest AirlinesBoeing 737-700Tue, Wed
10:55 AM→12:55 PMSTL to HOUSouthwest AirlinesBoeing 737-700Daily
11:00 AM→1:24 PMSTL to IAHUnited AirlinesEmbraer 175 · 2h 24mDaily
12:15 PM→2:15 PMSTL to HOUSouthwest AirlinesBoeing 737Mon, Thu, Fri, Sat
2:55 PM→5:19 PMSTL to IAHUnited AirlinesEmbraer 175 · 2h 24mDaily
3:05 PM→5:05 PMSTL to HOUSouthwest AirlinesBoeing 737 MAX 8Sun
5:50 PM→7:50 PMSTL to HOUSouthwest AirlinesBoeing 737-700Mon, Thu, Fri
5:55 PM→8:25 PMSTL to IAHUnited AirlinesEmbraer 175 · 2h 30mWed, Thu, Fri, Sun
8:45 PM→10:45 PMSTL to HOUSouthwest AirlinesBoeing 737Tue, Wed
8:55 PM→10:55 PMSTL to HOUSouthwest AirlinesBoeing 737Mon, Thu, Fri
9:00 PM→11:00 PMSTL to HOUSouthwest AirlinesBoeing 737Sun

Schedules last checked Oct 6, 2026. Times are local.

Flying from St. Louis to Houston

United Airlines flies most often, 4 to 5 times a day on the Embraer 175, Airbus A319 and CRJ 700. Southwest Airlines flies 3 to 5 times a day on the Boeing 737, Boeing 737-700 and Boeing 737 MAX 8.

Flights run every day of the week, from 7 on Saturdays to 10 on Thursdays, Fridays and Sundays. The first arrival in Houston is at 7:15 AM and the last at 11:00 PM.

STL to IAH is the busiest airport pair, with 32 flights a week, then STL to HOU with 31.

Flying back, Houston to St. Louis has 56 nonstop flights a week.

Return flights

Houston to St. LouisView

Find the cheapest day to fly from St. Louis to Houston.

Schedules as of Oct 9, 2026.