Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Portland via Denver: arrives on time 1%
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14:35 SEA → 18:20 DENWN 3617 · Southwest · 2h 45m · 14% on time, 0.0% cancelled
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1h 05m layover in Denver (DEN) · 45 min minimum on one ticket
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19:25 DEN → 21:00 PDXWN 1670 · Southwest · 2h 35m · 4% on time, 0.0% cancelled
Total trip 6h 25m, scheduled departure to arrival. Times are local. Both flew on 24 of the last 56 days.
Makes the connection24%The first flight arrived more than 20 minutes late on 76% of the days it flew: too late for the 45-minute minimum connection on a 1h 05m layover.
Arrives on time1%First flight not cancelled (0.0% are) × connection made (24%) × second flight not cancelled (0.0% are) and within 15 minutes (4%).
Total trip6h 25mSEA 14:35 to PDX 21:00, 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.