Ontario to Houston (ONT-IAH): nonstop flights and who flies them

United Airlines and Frontier Airlines fly the ONT to IAH nonstop about 11 times a week. The timetable below shows the nonstop scheduled at 3h 10m to 3h 15m for the 1,332 miles.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

Updated .

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11
Flights a week, 4-week average
3h 10m to 3h 15m
Scheduled flight time
1,332 mi
Nonstop distance
Free
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Ontario to Houston flight schedule

Scheduled nonstop departures for ONT to IAH starting October 22, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Ontario (ONT) to Houston (IAH)
Date Flight Airline Departs ONT Arrives IAH Duration Aircraft
UA 2267United Airlines06:0011:153h 15mBoeing 737-900
F9 3132Frontier Airlines18:4723:593h 12mAirbus A321
UA 2267United Airlines06:0011:153h 15mBoeing 737-900
F9 3132Frontier Airlines18:4723:593h 12mAirbus A321
UA 2267United Airlines06:0011:153h 15mBoeing 737-900
UA 2267United Airlines06:0011:153h 15mBoeing 737-900
F9 3132Frontier Airlines18:4723:593h 12mAirbus A321
UA 2267United Airlines06:0011:153h 15mBoeing 737-900
F9 3132Frontier Airlines18:4723:593h 12mAirbus A321
UA 2267United Airlines06:0011:153h 15mBoeing 737-900
UA 2267United Airlines06:0011:103h 10mBoeing 737-800

Showing all 11 scheduled ONT to IAH departures across 7 days with service, starting October 22, 2026. Later dates are on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure.

See every ONT to IAH date on the interactive map

Aircraft on the Ontario to Houston nonstop

In the schedule table on this page, United Airlines flies the Boeing 737-900 and the Boeing 737-800, and Frontier Airlines flies the Airbus A321. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

The full ONT to IAH nonstop schedule

This page carries the full ONT to IAH nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below.

See the schedule

Who operates each ONT to IAH nonstop and how often it runs, from 2LNR's schedule data.

Plan on the map

See ONT to IAH on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Ontario to Houston nonstop

Carriers operating ONT to IAH nonstop in the current schedule.

See ONT to IAH on the interactive map →

Frequently asked questions about ONT to IAH

How long is the flight from Ontario (ONT) to Houston (IAH)?
Scheduled flight times from Ontario (ONT) to Houston (IAH) run from 3h 10m to 3h 15m across the departures in the schedule table on this page. The nonstop covers about 1,332 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from ONT to IAH?
United Airlines and Frontier Airlines fly ONT to IAH nonstop. 2LNR doesn't show award or upgrade space for any of them on ONT to IAH, so this page carries the schedule rather than a space claim.
How many flights a week are there from ONT to IAH?
About 11 nonstop flights a week run between Ontario (ONT) and Houston (IAH) in the current schedule, operated by United Airlines and Frontier Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from ONT to IAH depart?
Scheduled ONT to IAH nonstops in the next 7 days with service leave between 06:00 and 18:47, local time at Ontario. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate ONT to IAH nonstop?
In the schedule table on this page, ONT to IAH nonstops fly as UA 2267 on United Airlines and F9 3132 on Frontier Airlines. The table lists each departure by date with its times and aircraft.
Does 2LNR show upgrade or award space on ONT to IAH?
Not on this route: 2LNR doesn't show award or upgrade space for any airline flying ONT to IAH. The page carries the full ONT to IAH nonstop schedule and who flies each departure, and the reverse direction is linked below.

See the full ONT to IAH nonstop schedule

Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro.

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