UA2661 PhiladelphiaPHL · 10:00 OntarioONT · 09:22
UA2661 by United Airlines flies from Philadelphia (PHL) to Ontario (ONT).
Same number through PHL → SFO → ONT
scheduled from PHL
Where the minutes go
last 5 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operation0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at PHL and ONT are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow on this route
ForecastPhiladelphia to San Francisco with United Airlines · Thu 29 Oct, local date
- Chance a departure leaves 60+ min late
- 7.1%0.7× usual
No cancellation outlook here: this airport's board does not publish cancellations reliably.
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 3 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Philadelphia to Ontario flights today
same route · United AirlinesIf UA2661 is cancelled, these are the other United Airlines nonstop flights from Philadelphia to Ontario on the same day, with scheduled departure times in PHL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA2661 actually runs
Pro Flight Search has tracked every published board update for UA2661 across the PHL and ONT boards: schedule changes, gate pushes and actual clocks. Usually lands ~14 min early. Based on 5 confirmed landings · 5/5 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how UA2661 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N17477, N77598, N27292, N17435.
Board clocks recorded as PHL and ONT published them.
Planning around UA2661? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — UA2661 Philadelphia to Ontario on-time performance, measured from the PHL and ONT airport boards.
https://proflightsearch.com/flight/UA2661
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