Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → St Louis via Denver: arrives on time 76%
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05:00 SEA → 08:43 DENUA 2601 · United · 2h 43m · 96% on time, 0.7% cancelled
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52m layover in Denver (DEN) · 45 min minimum on one ticket
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09:35 DEN → 12:42 STLUA 652 · United · 2h 07m · 84% on time, 0.6% cancelled
Total trip 5h 42m, scheduled departure to arrival (St Louis is 2 h ahead of Seattle). Times are local. Both flew on 37 of the last 56 days.
Makes the connection92%The first flight arrived more than 7 minutes late on 8% of the days it flew: too late for the 45-minute minimum connection on a 52m layover.
Arrives on time76%First flight not cancelled (0.7% are) × connection made (92%) × second flight not cancelled (0.6% are) and within 15 minutes (84%).
Total trip5h 42mSEA 05:00 to STL 12:42, 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.