Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → Portland via Dulles: arrives on time 57%
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15:40 DEN → 21:11 IADUA 421 · United · 3h 31m · 71% on time, 0.0% cancelled
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59m layover in Dulles (IAD) · 45 min minimum on one ticket
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22:10 IAD → 23:59 PWMUA 3459 · United, flown by Republic · 1h 49m · 85% on time, 4.8% cancelled
Total trip 6h 19m, scheduled departure to arrival (Portland is 2 h ahead of Denver). Times are local. Both flew on 0 of the last 56 days, too few to list among the best connections.
Makes the connection70%The first flight arrived more than 14 minutes late on 30% of the days it flew: too late for the 45-minute minimum connection on a 59m layover.
Arrives on time57%First flight not cancelled (0.0% are) × connection made (70%) × second flight not cancelled (4.8% are) and within 15 minutes (85%).
Total trip6h 19mDEN 15:40 to PWM 23:59, 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.