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

United Airlines and Frontier Airlines fly the IAH to ONT nonstop about 10 times a week. The timetable below shows the nonstop scheduled at 3h 29m to 3h 35m 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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10
Flights a week, 4-week average
3h 29m to 3h 35m
Scheduled flight time
1,332 mi
Nonstop distance
Free
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Houston to Ontario flight schedule

Scheduled nonstop departures for IAH to ONT 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 Houston (IAH) to Ontario (ONT)
Date Flight Airline Departs IAH Arrives ONT Duration Aircraft
F9 3131Frontier Airlines16:1817:523h 34mAirbus A321
UA 1563United Airlines20:3021:593h 29mBoeing 737-900
F9 3131Frontier Airlines16:1817:523h 34mAirbus A321
UA 1563United Airlines20:3021:593h 29mBoeing 737-900
UA 1563United Airlines20:3021:593h 29mBoeing 737-900
F9 3131Frontier Airlines16:1817:523h 34mAirbus A321
UA 1563United Airlines20:0621:413h 35mBoeing 737-800
F9 3131Frontier Airlines16:1817:523h 34mAirbus A321
UA 1563United Airlines20:3021:593h 29mBoeing 737-900
UA 1563United Airlines20:0521:403h 35mBoeing 737-800
UA 1563United Airlines20:3021:593h 29mBoeing 737-900

Showing all 11 scheduled IAH to ONT 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 IAH to ONT date on the interactive map

Aircraft on the Houston to Ontario 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 IAH to ONT nonstop schedule

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

See the schedule

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

Plan on the map

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

Airlines flying Houston to Ontario nonstop

Carriers operating IAH to ONT nonstop in the current schedule.

See IAH to ONT on the interactive map →

Frequently asked questions about IAH to ONT

How long is the flight from Houston (IAH) to Ontario (ONT)?
Scheduled flight times from Houston (IAH) to Ontario (ONT) run from 3h 29m to 3h 35m 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 IAH to ONT?
United Airlines and Frontier Airlines fly IAH to ONT nonstop. 2LNR doesn't show award or upgrade space for any of them on IAH to ONT, so this page carries the schedule rather than a space claim.
How many flights a week are there from IAH to ONT?
About 10 nonstop flights a week run between Houston (IAH) and Ontario (ONT) 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 IAH to ONT depart?
Scheduled IAH to ONT nonstops in the next 7 days with service leave between 16:18 and 20:30, local time at Houston. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate IAH to ONT nonstop?
In the schedule table on this page, IAH to ONT nonstops fly as UA 1563 on United Airlines and F9 3131 on Frontier Airlines. The table lists each departure by date with its times and aircraft.
Does 2LNR show upgrade or award space on IAH to ONT?
Not on this route: 2LNR doesn't show award or upgrade space for any airline flying IAH to ONT. The page carries the full IAH to ONT nonstop schedule and who flies each departure, and the reverse direction is linked below.

See the full IAH to ONT 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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