Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Chicago via Dulles: arrives on time 86%
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23:20 SEA → 07:22 IADUA 264 · United · 5h 02m · 91% on time, 4.5% cancelled
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3h 09m layover in Dulles (IAD) · 45 min minimum on one ticket
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10:31 IAD → 11:53 ORD +1 dayUA 1252 · United · 2h 22m · 92% on time, 0.8% cancelled
Total trip 10h 33m, scheduled departure to arrival (Chicago is 2 h ahead of Seattle). Times are local. Both flew on 41 of the last 56 days.
Makes the connection98%The first flight arrived more than 144 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 3h 09m layover.
Arrives on time86%First flight not cancelled (4.5% are) × connection made (98%) × second flight not cancelled (0.8% are) and within 15 minutes (92%).
Total trip10h 33mSEA 23:20 to ORD 11:53, 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.