Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Seattle via San Francisco: arrives on time 51%
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14:51 IAD → 17:38 SFOUA 2862 · United · 5h 47m · 82% on time, 0.3% cancelled
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50m layover in San Francisco (SFO) · 45 min minimum on one ticket
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18:28 SFO → 20:53 SEAUA 1577 · United · 2h 25m · 69% on time, 0.0% cancelled
Total trip 9h 02m, scheduled departure to arrival (Seattle is 3 h behind Dulles). Times are local. Both flew on 55 of the last 56 days.
Makes the connection74%The first flight arrived more than 5 minutes late on 26% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time51%First flight not cancelled (0.3% are) × connection made (74%) × second flight not cancelled (0.0% are) and within 15 minutes (69%).
Total trip9h 02mIAD 14:51 to SEA 20:53, 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.