Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Diego → San Francisco via Denver: arrives on time 4%
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17:20 SAN → 20:40 DENWN 4151 · Southwest · 2h 20m · 45% on time, 0.0% cancelled
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1h 00m layover in Denver (DEN) · 45 min minimum on one ticket
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21:40 DEN → 23:25 SFOWN 4303 · Southwest · 2h 45m · 10% on time, 0.0% cancelled
Total trip 6h 05m, scheduled departure to arrival. Times are local. Both flew on 32 of the last 56 days.
Makes the connection45%The first flight arrived more than 15 minutes late on 55% of the days it flew: too late for the 45-minute minimum connection on a 1h 00m layover.
Arrives on time4%First flight not cancelled (0.0% are) × connection made (45%) × second flight not cancelled (0.0% are) and within 15 minutes (10%).
Total trip6h 05mSAN 17:20 to SFO 23:25, 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.