Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Houston via Chicago: arrives on time 41%
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11:45 SEA → 18:00 MDWWN 3081 · Southwest · 4h 15m · 57% on time, 2.0% cancelled
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1h 15m layover in Chicago (MDW) · 45 min minimum on one ticket
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19:15 MDW → 21:50 HOUWN 1431 · Southwest · 2h 35m · 51% on time, 2.4% cancelled
Total trip 8h 05m, scheduled departure to arrival (Houston is 2 h ahead of Seattle). Times are local. Both flew on 40 of the last 56 days.
Makes the connection83%The first flight arrived more than 30 minutes late on 17% of the days it flew: too late for the 45-minute minimum connection on a 1h 15m layover.
Arrives on time41%First flight not cancelled (2.0% are) × connection made (83%) × second flight not cancelled (2.4% are) and within 15 minutes (51%).
Total trip8h 05mSEA 11:45 to HOU 21:50, 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.