Direct flights from Boston (BOS) to San Francisco (SFO): 269 nonstop departures observed each week across 18 airlines. 43% of the last 14 tracked flights arrived within 15 minutes of schedule. The median arrival is 13 minutes early. 5 of the 18 tracked flights were cancelled. The nonstop covers 4,341 km, an estimated 6 hours 4 minutes in the air. Measured by Pro Flight Search from live flight boards at Boston and San Francisco. Updated 13 November 2026 at 21:31 UTC.
The BOS board at 16:31 shows departure at 17:30 instead of 13:51, gate B30 (TB).
The BOS board at 16:31 shows departure at 16:49 instead of 15:50, gate C36 (TC).
Checked BOS board 16:31 · SFO board 13:23
of the last 14 tracked BOS → SFO flights arrived within 15 minutes
Median arrival delay is −13 min. 5 of 18 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Flights AF2224 varies Fr Su · AF8672 21:23 daily · AF3726 23:31 Tu We Th
Flights NZ9019 10:59 Mo Th Fr Sa Su · NZ9023 11:54 daily · NZ9020 12:49 daily · NZ9021 13:34 Mo Th Fr Su
Flights OZ9530 21:50 daily
Flights DL977 07:45 daily · DL860 10:05 daily · DL1655 17:45 daily · DL2919 varies daily
Flights LY4578 varies Mo Tu Th Su · LY4227 13:43 Mo Tu Th Su
Flights EY8015 00:25 Tu We · EY8330 19:35 Mo Tu We Th Fr Su · EY8011 20:55 Sa · EY8038 20:55 Mo Th Fr Su
Flights FI7897 00:25 Mo Tu We Th Fr Su
Flights AZ4385 21:50 We Fr Su
Flights JL5938 00:25 daily
Flights B6633 06:00 daily · B6833 09:30 daily · B6733 15:50 daily · B6933 17:05 Mo Th Fr Su
Flights KL5777 21:23 Fr Sa Su
Flights LA6139 21:23 daily · LA6228 23:31 Tu We
Flights SK3585 21:23 Mo Tu Th Fr Sa Su
Flights SQ1539 00:25 daily
Flights TP4399 00:25 daily · TP4401 varies Mo Tu Th Fr Sa Su
Flights UA1023 07:10 Mo Th Fr Sa Su · UA582 08:05 daily · UA574 09:00 daily · UA1074 09:45 Mo Th Fr Su
Flights VA8311 10:59 Mo Th Fr Sa Su · VA8310 11:54 daily · VA8520 12:49 daily · VA8313 13:34 Mo Th Fr Su
Flights WS7646 13:43 Mo Th Fr Su
Actual board outcomes rather than schedules, paired departure and arrival per flight and day.
Conditions are tightest at SFO: a 56% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +24 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →
next sweep in 120s
Pro Flight Search records official board updates for nonstop BOS to SFO flights through the day: 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.
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
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search: Boston (BOS) to San Francisco (SFO) route reliability, measured from operated flights on official airport boards.
https://proflightsearch.com/search-flights/BOS-SFO
Some delays possible. The arrival side at SFO is the weaker end, route health score 57/100. The airports section above carries the live status and delay window at both ends.
Operators schedule morning departures around 06:00 and evening departures around 17:05 from BOS. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SFO delay card to confirm conditions when you'd arrive.
Great-circle distance is 4,341 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 336–402 min gate-to-gate on this route.
18 carriers operate this route, around 269 flights a week between them. Compare carrier days and times in the airline list above.
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