UA2356United Airlines · SFO → BOS
live · 33m ago
Route confirmed United Airlines

UA2356 San FranciscoSFO · 10:50 BostonBOS · 19:44

UA2356 by United Airlines flies from San Francisco (SFO) to Boston (BOS) for the Fri, Oct 16 departure.

Right nowEn route to Boston · off blocks 10:53 · 3 min late
19:47

estimated arrival at BOS · local time · past this estimate · waiting on the board

En routeUA2356 · position estimated
SFOSan FranciscoBOSBoston
Estimated from the boardsarr 19:47

Board estimate · gate and arrival times. Off blocks 10:53 · typical taxi-out at SFO ≈ 13 min. No receiver coverage over open ocean.

Typical gate push+3 minmedian posted departure
Typical arrival+3 minmedian over 2 operations

The route today

live boards
SFOSan FranciscoOn-time likelySFO delay board →
BOSBostonOn-time likelyBOS delay board →
SFO→BOSevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Early read, sample still building
58%Chance of 15+ min delay
4.8%Chance of cancellation
+19 minAvg hub delay right now

Driven mainly by BOS (Boston), currently flying MVFR (marginal visual). 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 departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other San Francisco to Boston flights today

same route · United Airlines
UA371departs 07:00
UA2647departs 08:15
UA1372departs 12:10
UA2634departs 14:05
UA796departs 21:15
UA8156departs 23:18

If UA2356 is cancelled, these are the other United Airlines nonstop flights from San Francisco to Boston on the same day, with scheduled departure times in SFO local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA2356 actually runs

Pro Flight Search has tracked every published board update for UA2356 across the SFO and BOS boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 1 completed leg so far: landed -3 min. Not enough to call it.

The verdict above is that record speaking, so it reflects how UA2356 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
10-16SFO 10:50 10:53 (+3)BOS 19:44 19:47 (+3)
10-15SFO 10:50 10:44 (−6)BOS 19:44 19:41 (−3)

Board clocks recorded as SFO and BOS published them.

Planning around UA2356? 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 — UA2356 San Francisco to Boston on-time performance, measured from the SFO and BOS airport boards.

Canonical URL
https://proflightsearch.com/flight/UA2356
How we measure this →