Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Dulles via Chicago: arrives on time 90%
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23:11 SEA → 05:18 ORDUA 747 · United · 4h 07m · 86% on time, 0.3% cancelled
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3h 22m layover in Chicago (ORD) · 45 min minimum on one ticket
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08:40 ORD → 11:52 IAD +1 dayUA 2277 · United · 2h 12m · 92% on time, 0.0% cancelled
Total trip 9h 41m, scheduled departure to arrival (Dulles is 3 h ahead of Seattle). Times are local. Both flew on 55 of the last 56 days.
Makes the connection98%The first flight arrived more than 157 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 3h 22m layover.
Arrives on time90%First flight not cancelled (0.3% are) × connection made (98%) × second flight not cancelled (0.0% are) and within 15 minutes (92%).
Total trip9h 41mSEA 23:11 to IAD 11:52, 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.