Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Seattle via Newark: arrives on time 38%
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17:42 IAD → 19:10 EWRUA 1831 · United · 1h 28m · 59% on time, 2.7% cancelled
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1h 20m layover in Newark (EWR) · 45 min minimum on one ticket
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20:30 EWR → 23:44 SEAUA 1796 · United · 6h 14m · 57% on time, 2.9% 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 connection71%The first flight arrived more than 35 minutes late on 29% of the days it flew: too late for the 45-minute minimum connection on a 1h 20m layover.
Arrives on time38%First flight not cancelled (2.7% are) × connection made (71%) × second flight not cancelled (2.9% are) and within 15 minutes (57%).
Total trip9h 02mIAD 17:42 to SEA 23:44, 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.