Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Antonio → Seattle via Houston: arrives on time 30%
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12:50 SAT → 13:55 HOUWN 3566 · Southwest · 1h 05m · 78% on time, 0.0% cancelled
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50m layover in Houston (HOU) · 45 min minimum on one ticket
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14:45 HOU → 17:25 SEAWN 3566 · Southwest · 4h 40m · 54% on time, 0.0% cancelled
Total trip 6h 35m, scheduled departure to arrival (Seattle is 2 h behind San Antonio). Times are local. Both flew on 24 of the last 56 days.
Makes the connection56%The first flight arrived more than 5 minutes late on 44% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time30%First flight not cancelled (0.0% are) × connection made (56%) × second flight not cancelled (0.0% are) and within 15 minutes (54%).
Total trip6h 35mSAT 12:50 to SEA 17:25, 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.