Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Philadelphia via San Francisco: arrives on time 36%
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13:30 SEA → 15:48 SFOUA 737 · United · 2h 18m · 56% on time, 0.6% cancelled
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54m layover in San Francisco (SFO) · 45 min minimum on one ticket
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16:42 SFO → 01:23 PHL +1 dayUA 2619 · United · 5h 41m · 72% on time, 0.0% cancelled
Total trip 8h 53m, scheduled departure to arrival (Philadelphia is 3 h ahead of Seattle). Times are local. Both flew on 38 of the last 56 days.
Makes the connection51%The first flight arrived more than 9 minutes late on 49% of the days it flew: too late for the 45-minute minimum connection on a 54m layover.
Arrives on time36%First flight not cancelled (0.6% are) × connection made (51%) × second flight not cancelled (0.0% are) and within 15 minutes (72%).
Total trip8h 53mSEA 13:30 to PHL 01:23, 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.