Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Boston via Newark: arrives on time 67%
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23:59 SFO → 08:22 EWRUA 2416 · United · 5h 23m · 75% on time, 3.1% cancelled
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1h 38m layover in Newark (EWR) · 45 min minimum on one ticket
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10:00 EWR → 11:16 BOS +1 dayUA 375 · United · 1h 16m · 80% on time, 4.9% cancelled
Total trip 8h 17m, scheduled departure to arrival (Boston is 3 h ahead of San Francisco). Times are local. Both flew on 55 of the last 56 days.
Makes the connection91%The first flight arrived more than 53 minutes late on 9% of the days it flew: too late for the 45-minute minimum connection on a 1h 38m layover.
Arrives on time67%First flight not cancelled (3.1% are) × connection made (91%) × second flight not cancelled (4.9% are) and within 15 minutes (80%).
Total trip8h 17mSFO 23:59 to BOS 11:16, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.