Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Diego → Houston via Chicago: arrives on time 29%
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12:10 SAN → 18:10 MDWWN 4163 · Southwest · 4h 00m · 50% on time, 2.4% cancelled
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1h 05m 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 7h 40m, scheduled departure to arrival (Houston is 2 h ahead of San Diego). Times are local. Both flew on 40 of the last 56 days.
Makes the connection60%The first flight arrived more than 20 minutes late on 40% of the days it flew: too late for the 45-minute minimum connection on a 1h 05m layover.
Arrives on time29%First flight not cancelled (2.4% are) × connection made (60%) × second flight not cancelled (2.4% are) and within 15 minutes (51%).
Total trip7h 40mSAN 12:10 to HOU 21:50, 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.