8C3388ATIIn the air, 43 min late
Left ONT at 05:08, 43 min after its 04:25 slot.
Track 8C3388 →
live
Direct flights from Ontario (ONT) to Houston (IAH): 13 nonstop departures observed each week across 2 airlines. 83% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is 5 minutes late. No cancellations were recorded across the 6 tracked flights. The nonstop covers 2,142 km, an estimated 3 hours 15 minutes in the air. Measured by Pro Flight Search from live flight boards at Ontario and Houston. Updated 23 October 2026 at 00:44 UTC.
Today, ONT → IAH
Thu 22 Oct · local timesChecked ONT board 15:18 · IAH board 19:44
ONT
Ontario
heavy · +42
IAH
Houston
smooth · +0
2,142 km · ~3h 15m est.
Runs reliable · 2 airlines · 13x weekly · nonstop
83% on time
of the last 6 operated ONT → IAH flights arrived within 15 minutes
Median arrival delay is +5 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+5 minacross the last 6 operated legs
Flight time~3h 15mestimated from route distance
Weekly departures13x2 direct airlines on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Air Transport InternationalUnited Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at ONT: 36% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Ontario to Houston route actually runs
Pro Flight Search records official board updates for nonstop ONT to IAH flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Ontario (ONT) to Houston (IAH) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/ONT-IAH
ONT to IAH questions
Is ONT–IAH running on time right now?
Mostly on schedule. The departure side at ONT is the weaker end, route health score 72/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from ONT to IAH?
Great-circle distance is 2,142 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 181–214 min gate-to-gate on this route.
How often does ONT–IAH fly?
2 carriers operate this route, around 13 flights a week between them. Compare carrier days and times in the airline list above.
What does the route health score measure?
A blend of departure-side delay at ONT and arrival-side delay at IAH, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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