Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
St Louis → San Francisco via Atlanta: arrives on time 63%
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09:24 STL → 12:02 ATLDL 1571 · Delta · 1h 38m · 94% on time, 2.9% cancelled
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3h 33m layover in Atlanta (ATL) · 45 min minimum on one ticket
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15:35 ATL → 17:31 SFODL 823 · Delta · 5h 02m · 66% on time, 1.1% cancelled
Total trip 10h 13m, scheduled departure to arrival (San Francisco is 2 h behind St Louis). Times are local. Both flew on 43 of the last 56 days.
Makes the connection99%The first flight arrived more than 168 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 3h 33m layover.
Arrives on time63%First flight not cancelled (2.9% are) × connection made (99%) × second flight not cancelled (1.1% are) and within 15 minutes (66%).
Total trip10h 13mSTL 09:24 to SFO 17:31, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.