Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Portland → Dulles via Houston: arrives on time 55%
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13:02 PDX → 19:21 IAHUA 1927 · United · 4h 19m · 77% on time, 0.0% cancelled
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59m layover in Houston (IAH) · 45 min minimum on one ticket
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20:20 IAH → 00:31 IAD +1 dayUA 2775 · United · 3h 11m · 73% on time, 0.0% cancelled
Total trip 8h 29m, scheduled departure to arrival (Dulles is 3 h ahead of Portland). Times are local. Both flew on 36 of the last 56 days.
Makes the connection75%The first flight arrived more than 14 minutes late on 25% of the days it flew: too late for the 45-minute minimum connection on a 59m layover.
Arrives on time55%First flight not cancelled (0.0% are) × connection made (75%) × second flight not cancelled (0.0% are) and within 15 minutes (73%).
Total trip8h 29mPDX 13:02 to IAD 00:31, 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.