Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Columbus via Denver: arrives on time 60%
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07:50 SEA → 11:25 DENWN 3397 · Southwest · 2h 35m · 93% on time, 0.0% cancelled
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3h 15m layover in Denver (DEN) · 45 min minimum on one ticket
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14:40 DEN → 19:20 CMHWN 1509 · Southwest · 2h 40m · 61% on time, 2.0% cancelled
Total trip 8h 30m, scheduled departure to arrival (Columbus is 3 h ahead of Seattle). Times are local. Both flew on 32 of the last 56 days.
Makes the connection100%The first flight arrived more than 150 minutes late on 0% of the days it flew: too late for the 45-minute minimum connection on a 3h 15m layover.
Arrives on time60%First flight not cancelled (0.0% are) × connection made (100%) × second flight not cancelled (2.0% are) and within 15 minutes (61%).
Total trip8h 30mSEA 07:50 to CMH 19:20, 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.