Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → New York via Boston: arrives on time 81%
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22:10 SFO → 06:45 BOSDL 1655 · Delta · 5h 35m · 69% on time, 1.7% cancelled
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2h 20m layover in Boston (BOS) · 45 min minimum on one ticket
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09:05 BOS → 10:24 JFK +1 dayDL 5720 · Delta, flown by Republic · 1h 19m · 87% on time, 2.2% cancelled
Total trip 9h 14m, scheduled departure to arrival (New York is 3 h ahead of San Francisco). Times are local. Both flew on 32 of the last 56 days.
Makes the connection96%The first flight arrived more than 95 minutes late on 4% of the days it flew: too late for the 45-minute minimum connection on a 2h 20m layover.
Arrives on time81%First flight not cancelled (1.7% are) × connection made (96%) × second flight not cancelled (2.2% are) and within 15 minutes (87%).
Total trip9h 14mSFO 22:10 to JFK 10:24, 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.