Delta Air LinesDL
Flights DL400 07:00 daily · DL977 12:25 daily · DL860 15:00 Mo We Th Fr · DL1189 21:48 Sa Su
live
Direct flights from San Francisco (SFO) to Boston (BOS): 38 nonstop departures observed each week across 6 airlines. 33% of the last 15 operated flights arrived within 15 minutes of schedule. The median arrival is 61 minutes late. No cancellations were recorded across the 15 tracked flights. 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 San Francisco and Boston. Updated 9 September 2026 at 21:08 UTC.
SFO
San Francisco
smooth · +8
BOS
Boston
busy · +20
4,341 km · ~6h 04m est.
Runs rough · 6 airlines · 38x weekly · nonstop
33% on time
of the last 15 operated SFO → BOS flights arrived within 15 minutes
Median arrival delay is +61 min. 0 of 15 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+61 minacross the last 15 operated legs
Flight time~6h 04mestimated from route distance
Weekly departures38x6 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 15
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Delta Air LinesIcelandairJetBlue AirwaysLATAM Chile
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysIcelandairFI
Flights FI7834 varies daily
JetBlue AirwaysB6
Flights B6434 06:00 daily · B61734 10:25 daily · B61534 varies daily · B61634 12:30 daily
LATAM ChileLA
Flights LA6205 varies Tu We Su
Singapore AirlinesSQ
Flights SQ1544 varies daily
United AirlinesUA
Flights UA371 07:00 Mo Th Fr Su · UA2647 08:12 daily · UA2356 10:16 daily · UA1372 12:10 daily
History
operated legs · board outcomes09-09FI7830departed+102
09-09FI7834departed+113
09-09NZ9010departed+61
09-09NZ9015departed+65
09-09VA8305departed+61
09-09VA8309departed+65
Actual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at SFO: 58% odds of a 15+ minute delay and around +23 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the San Francisco to Boston route actually runs
Pro Flight Search records official board updates for nonstop SFO to BOS 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
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 — San Francisco (SFO) to Boston (BOS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SFO-BOS
SFO to BOS questions
Is SFO–BOS running on time right now?
Mostly on schedule. The arrival side at BOS is the weaker end, route health score 81/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on SFO–BOS?
Operators schedule morning departures around 06:00 and evening departures around 21:10 from SFO. Earlier flights typically land before destination-airport delays accumulate later in the day; check the BOS delay card to confirm conditions when you'd arrive.
How long is the flight from SFO to BOS?
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.
How often does SFO–BOS fly?
6 carriers operate this route, around 129 flights a week between them. Compare carrier days and times in the airline list above.
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