Nonstop flights from Ontario to Houston

3 airlines fly from Ontario (ONT) to 2 Houston airports (IAH and HOU), with up to 3 flights a day.

ONTIAH

Routes

2 airport pairs

When they leave

Ontario time

5:45a12:30pFirst departure 5:45 AM, last 12:30 PM

Four in the morning, 5:45 AM to 11:00 AM, then one afternoon flight at 12:30 PM.

Every flight

Earliest first

5:45 AM→11:04 AMONT to IAHUnited AirlinesBoeing 737Daily
9:36 AM→2:56 PMONT to IAHFrontier AirlinesUntil Nov 30Airbus A321neoDaily
10:10 AM→3:15 PMONT to HOUSouthwest AirlinesBoeing 737 MAX 8Sun
11:00 AM→4:05 PMONT to HOUSouthwest AirlinesBoeing 737 MAX 8Mon, Thu, Fri
12:30 PM→5:35 PMONT to HOUSouthwest AirlinesBoeing 737Tue, Wed, Sat

Schedules last checked Sep 21, 2026. Times are local.

Flying from Ontario to Houston

Frontier Airlines flies daily on the Airbus A321neo. Southwest Airlines flies daily on the Boeing 737 MAX 8 and Boeing 737. United Airlines flies daily on the Boeing 737.

There are 3 flights every day of the week. The first arrival in Houston is at 11:04 AM and the last at 5:35 PM.

ONT to IAH is the busiest airport pair, with 14 flights a week, then ONT to HOU with 7.

On ONT to IAH, Frontier Airlines flies it until Nov 30.

Flying back, Houston to Ontario has 18 nonstop flights a week.

Return flights

Houston to OntarioView

Find the cheapest day to fly from Ontario to Houston.

Schedules as of Oct 9, 2026.