Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Boston via Salt Lake City: arrives on time 78%
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05:50 SFO → 08:42 SLCDL 1331 · Delta · 1h 52m · 96% on time, 0.5% cancelled
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1h 08m layover in Salt Lake City (SLC) · 45 min minimum on one ticket
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09:50 SLC → 16:37 BOSDL 657 · Delta · 4h 47m · 82% on time, 1.1% cancelled
Total trip 7h 47m, scheduled departure to arrival (Boston is 3 h ahead of San Francisco). Times are local. Both flew on 56 of the last 56 days.
Makes the connection97%The first flight arrived more than 23 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 1h 08m layover.
Arrives on time78%First flight not cancelled (0.5% are) × connection made (97%) × second flight not cancelled (1.1% are) and within 15 minutes (82%).
Total trip7h 47mSFO 05:50 to BOS 16:37, 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.