Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → St Louis via Houston: arrives on time 81%
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07:05 SEA → 13:31 IAHUA 2135 · United · 4h 26m · 92% on time, 0.6% cancelled
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2h 00m layover in Houston (IAH) · 45 min minimum on one ticket
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15:31 IAH → 17:42 STLUA 6160 · United, flown by Mesa · 2h 11m · 84% on time, 0.0% cancelled
Total trip 8h 37m, scheduled departure to arrival (St Louis is 2 h ahead of Seattle). Times are local. Both flew on 38 of the last 56 days.
Makes the connection98%The first flight arrived more than 75 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 2h 00m layover.
Arrives on time81%First flight not cancelled (0.6% are) × connection made (98%) × second flight not cancelled (0.0% are) and within 15 minutes (84%).
Total trip8h 37mSEA 07:05 to STL 17:42, 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.