UA1646 HonoluluHNL · 13:15 San FranciscoSFO · 21:19
UA1646 by United Airlines flies from Honolulu (HNL) to San Francisco (SFO).
scheduled from HNL
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at HNL and SFO 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 →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Honolulu to San Francisco flights today
same route · United AirlinesIf UA1646 is cancelled, these are the other United Airlines nonstop flights from Honolulu to San Francisco on the same day, with scheduled departure times in HNL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA1646 actually runs
Pro Flight Search has tracked every published board update for UA1646 across the HNL and SFO boards: schedule changes, gate pushes and actual clocks. Usually lands ~24 min early. Based on 4 confirmed landings · 4/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA1646 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: N210UA, N215UA.
Board clocks recorded as HNL and SFO published them.
Planning around UA1646? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA1646 Honolulu to San Francisco on-time performance, measured from the HNL and SFO airport boards.
https://proflightsearch.com/flight/UA1646
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