Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Columbus → San Francisco via Dulles: arrives on time 48%
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10:30 CMH → 11:54 IADUA 4056 · United, flown by Mesa · 1h 24m · 74% on time, 0.0% cancelled
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46m layover in Dulles (IAD) · 45 min minimum on one ticket
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12:40 IAD → 15:27 SFOUA 1434 · United · 5h 47m · 79% on time, 0.3% cancelled
Total trip 7h 57m, scheduled departure to arrival (San Francisco is 3 h behind Columbus). Times are local. Both flew on 27 of the last 56 days.
Makes the connection61%The first flight arrived more than 1 minutes late on 39% of the days it flew: too late for the 45-minute minimum connection on a 46m layover.
Arrives on time48%First flight not cancelled (0.0% are) × connection made (61%) × second flight not cancelled (0.3% are) and within 15 minutes (79%).
Total trip7h 57mCMH 10:30 to SFO 15:27, layover included
Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.