Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
St Louis → San Francisco via Denver: arrives on time 7%
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16:00 STL → 17:20 DENWN 3912 · Southwest · 2h 20m · 51% on time, 0.0% cancelled
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50m layover in Denver (DEN) · 45 min minimum on one ticket
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18:10 DEN → 19:55 SFOWN 4670 · Southwest · 2h 45m · 21% on time, 0.0% cancelled
Total trip 5h 55m, scheduled departure to arrival (San Francisco is 2 h behind St Louis). Times are local. Both flew on 36 of the last 56 days.
Makes the connection32%The first flight arrived more than 5 minutes late on 68% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time7%First flight not cancelled (0.0% are) × connection made (32%) × second flight not cancelled (0.0% are) and within 15 minutes (21%).
Total trip5h 55mSTL 16:00 to SFO 19:55, 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.