Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
St Louis → Los Angeles via Denver: arrives on time 12%
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16:00 STL → 17:20 DENWN 3912 · Southwest · 2h 20m · 51% on time, 0.0% cancelled
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1h 25m layover in Denver (DEN) · 45 min minimum on one ticket
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18:45 DEN → 20:15 LAXWN 2217 · Southwest · 2h 30m · 16% on time, 3.5% cancelled
Total trip 6h 15m, scheduled departure to arrival (Los Angeles is 2 h behind St Louis). Times are local. Both flew on 55 of the last 56 days.
Makes the connection74%The first flight arrived more than 40 minutes late on 26% of the days it flew: too late for the 45-minute minimum connection on a 1h 25m layover.
Arrives on time12%First flight not cancelled (0.0% are) × connection made (74%) × second flight not cancelled (3.5% are) and within 15 minutes (16%).
Total trip6h 15mSTL 16:00 to LAX 20:15, 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.