Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Philadelphia → San Francisco via Chicago: arrives on time 69%
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17:00 PHL → 18:33 ORDUA 308 · United · 2h 33m · 63% on time, 1.3% cancelled
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3h 02m layover in Chicago (ORD) · 45 min minimum on one ticket
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21:35 ORD → 00:32 SFO +1 dayUA 2106 · United · 4h 57m · 78% on time, 2.5% cancelled
Total trip 10h 32m, scheduled departure to arrival (San Francisco is 3 h behind Philadelphia). Times are local. Both flew on 56 of the last 56 days.
Makes the connection93%The first flight arrived more than 137 minutes late on 7% of the days it flew: too late for the 45-minute minimum connection on a 3h 02m layover.
Arrives on time69%First flight not cancelled (1.3% are) × connection made (93%) × second flight not cancelled (2.5% are) and within 15 minutes (78%).
Total trip10h 32mPHL 17:00 to SFO 00:32, 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.