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

United Airlines and Frontier Airlines fly the IAH to ONT nonstop about 12 times a week. United Airlines sets the rhythm here, a few flights a day with a small premium cabin on each, so a date with open space is worth acting on the day you see it. United Airlines and Frontier Airlines fly the route nonstop in 2LNR's schedule data; the timetable and the reverse direction are below.

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

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12
Nonstop flights a week
1,332 mi
Nonstop distance
Free
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Houston to Ontario flight schedule

Scheduled nonstop departures for IAH to ONT, last checked against our schedule feed on September 6, 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
UA 1563United Airlines20:3121:553h 24m739
F9 3131Frontier Airlines13:0514:373h 32m32N
UA 1563United Airlines20:3021:593h 29m739
F9 3131Frontier Airlines13:0514:373h 32m32N
UA 1563United Airlines20:3121:553h 24m739
UA 758United Airlines16:4718:123h 25m739
UA 1563United Airlines20:3021:593h 29m739
F9 3131Frontier Airlines13:0514:373h 32m32N
UA 1563United Airlines20:3021:593h 29m739
F9 3131Frontier Airlines13:0514:373h 32m32N
UA 1563United Airlines20:3021:593h 29m739
UA 1563United Airlines20:3121:553h 24m739

Showing all 12 scheduled IAH to ONT departures across the next 7 days with service. 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 has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every IAH to ONT date on the interactive map

The full IAH to ONT nonstop schedule

United Airlines and Frontier Airlines fly the route nonstop in 2LNR's schedule data. 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 real availability

Confirmed upgrade and award seats on each IAH to ONT departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

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. 2LNR tracks confirmed upgrade and award space on each of them.

See IAH to ONT on the interactive map →

Frequently asked questions about IAH to ONT

How far is Ontario from Houston?
IAH to ONT covers about 1,332 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from IAH to ONT?
United Airlines and Frontier Airlines fly the route nonstop. None of them is a carrier 2LNR reads inventory for, so this page carries the IAH to ONT schedule rather than a space claim.
How many flights a week are there from IAH to ONT?
About 12 nonstop flights a week run between Houston and Ontario 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 13:05 and 20:31, local time at Houston. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Does 2LNR show upgrade or award space on IAH to ONT?
Not on this route: none of United Airlines and Frontier Airlines is a carrier 2LNR reads inventory for. 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. On the routes 2LNR does read inventory for, upgrade and award space shows by date, the next 14 days free on every product and the full horizon on Pro.

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