SFO → BOSSan Francisco to Boston

live

Direct flights from San Francisco (SFO) to Boston (BOS): 40 nonstop departures observed each week across 7 airlines. 28% of the last 18 operated flights arrived within 15 minutes of schedule. The median arrival is 61 minutes late. 4 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 San Francisco and Boston. Updated 10 September 2026 at 21:25 UTC.

SFO San Francisco smooth · +5
BOS Boston busy · +23
4,341 km · ~6h 04m est.
dep bank 06:00–23:5940x weekly
Runs rough · 7 airlines · 40x weekly · nonstop
28% on time

of the last 18 operated SFO → BOS flights arrived within 15 minutes

Median arrival delay is +61 min. 4 of 18 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+61 minacross the last 18 operated legs
Flight time~6h 04mestimated from route distance
Weekly departures40x7 direct airlines on the leg
Cancelled22.2%recent route rate · 4 of 18

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Air ChinaDelta Air LinesIcelandairJetBlue Airways

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 days
Air ChinaCA

Flights CA7307 varies We Sa

Delta Air LinesDL

Flights DL400 07:00 daily · DL977 12:25 daily · DL860 15:00 Mo Th Fr · DL1189 21:48 Sa Su

IcelandairFI

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 outcomes
09-10B61034dep +103 → arr+92
09-10B6134arrived+0
09-10B61734dep +76 → arr+61
09-10DL400cancelledCNX
09-10DL977dep +7 → arr+1
09-10FI7830departed+76
09-10FI7834departed+103
09-10LY4228cancelledCNX
09-10MU8695departed+7
09-10NZ9010departed+16
09-10NZ9015departed+116
09-10SK3586cancelledCNX
09-10UA1372dep +16 → arr+13
09-10UA2356dep +116 → arr+96
09-10UA2647arrived−4
09-10VA8305departed+16
09-10VA8309departed+116
09-10VS1787cancelledCNX

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SFOSan Francisco +5 min smooth 🌤 scattered clouds · WNW 8 kt Full SFO delay board →
BOSBoston +23 min busy 🌤 scattered clouds · W 15 kt Full BOS delay board →

Weather 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 →

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
https://proflightsearch.com/search-flights/SFO-BOS
How we measure this →

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 80/100. 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?

7 carriers operate this route, around 132 flights a week between them. Compare carrier days and times in the airline list above.