UA1734 BostonBOS · 05:45 Los AngelesLAX · 07:20
UA1734 by United Airlines flies from Boston (BOS) to Los Angeles (LAX).
Same number through BOS → IAD → LAX
scheduled from BOS
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at BOS and LAX 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. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
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 Boston to Los Angeles flights today
same route · United AirlinesIf UA1734 is cancelled, these are the other United Airlines nonstop flights from Boston to Los Angeles on the same day, with scheduled departure times in BOS local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA1734 actually runs
Pro Flight Search has tracked every published board update for UA1734 across the BOS and LAX boards: schedule changes, gate pushes and actual clocks. Usually lands ~7 min early. Based on 6 confirmed landings · 6/6 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA1734 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: N37440, N77585, N17413, N17597.
Board clocks recorded as BOS and LAX published them.
Planning around UA1734? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA1734 Boston to Los Angeles on-time performance, measured from the BOS and LAX airport boards.
https://proflightsearch.com/flight/UA1734
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