Allegiant AirG4
Flights G44101 07:30 Sa
live
Direct flights from Ontario (ONT) to Williamsport (IPT): 1 nonstop departure observed each week across 1 airline. The median arrival is 24 minutes late. No cancellations were recorded across the 1 tracked flight. The nonstop covers 3,635 km, an estimated 5 hours 10 minutes in the air. Measured by Pro Flight Search from live flight boards at Ontario and Williamsport. Updated 15 August 2026 at 22:18 UTC.
ONT
Ontario
smooth · +13
IPT
Williamsport
tracking
3,635 km · ~5h 10m est.
Running clean · 1 airline · 1x weekly · nonstop
82 / 100
route health from live ONT and IPT delay boards
Median arrival delay is +24 min. 0 of 1 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Search live fares for this route →Median arrival+24 minacross the last 1 operated legs
Flight time~5h 10mestimated from route distance
Weekly departures1x1 direct airline on the leg
Current nonstop fares
ONT → IPT · one way · economy · 1 adult
TodayChecking…Direct airline fares
TomorrowChecking…Direct airline fares
In one weekChecking…Direct airline fares
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Allegiant Air
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 boardsnext sweep in 120s
How the Ontario to Williamsport route actually runs
Pro Flight Search tracks every published board update for nonstop ONT to IPT flights: 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. Fares link straight to the operating airline with no markups.
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 Williamsport (IPT) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/ONT-IPT
ONT to IPT questions
Is ONT–IPT running on time right now?
Smooth skies ahead. The departure side at ONT is the weaker end, route health score 82/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from ONT to IPT?
Great-circle distance is 3,635 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 287–342 min gate-to-gate on this route.
How often does ONT–IPT fly?
Allegiant Air runs the route with about 1 flight a week (sat). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at ONT and arrival-side delay at IPT, 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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