What is the cheapest month to fly from Ontario to Houston?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Ontario (ONT) to Houston (IAH), with fares starting from $145.

What is the lowest current fare from ONT to IAH?

The lowest currently-listed fare from Ontario (ONT) to Houston (IAH) is $145 on 2026-09-21.

How long is the flight from Ontario to Houston?

Direct flights from ONT to IAH cover approximately 2,142 km (1,331 miles), with an estimated flight time of 2h 31m. Operating airlines: F9, UA.

Cheap flights from Ontario to Houston

Cheapest current fares: $145 in September 2026, 2,142 km direct flight in ~2h 31m.

Last updated August 11, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Ontario (ONT) to Houston (IAH). Refreshed daily.

Ontario (ONT) → Houston (IAH)

September 2026 $145
August 2026 $187

Frequently asked questions

What is the cheapest month to fly from Ontario to Houston?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Ontario (ONT) to Houston (IAH), with fares starting from $145.
What is the lowest current fare from ONT to IAH?

The lowest currently-listed fare from Ontario (ONT) to Houston (IAH) is $145 on 2026-09-21.
How long is the flight from Ontario to Houston?

Direct flights from ONT to IAH cover approximately 2,142 km (1,331 miles), with an estimated flight time of 2h 31m. Operating airlines: F9, UA.

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