Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Columbus → San Francisco via Boston: arrives on time 78%
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06:00 CMH → 08:06 BOSAA 4642 · American, flown by Republic · 2h 05m · 95% on time, 1.1% cancelled
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3h 29m layover in Boston (BOS) · 90 min minimum on separate tickets
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11:35 BOS → 15:02 SFOUA 1074 · United · 6h 27m · 80% on time, 0.4% cancelled
Total trip 12h 02m, scheduled departure to arrival (San Francisco is 3 h behind Columbus). Times are local. Both flew on 46 of the last 56 days.
Makes the connection99%The first flight arrived more than 119 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 29m layover.
Arrives on time78%First flight not cancelled (1.1% are) × connection made (99%) × second flight not cancelled (0.4% are) and within 15 minutes (80%).
Total trip12h 02mCMH 06:00 to SFO 15:02, 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.