Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
St Louis → San Francisco via Chicago: arrives on time 72%
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09:08 STL → 10:36 ORDAA 4104 · American, flown by Envoy · 1h 28m · 94% on time, 0.0% cancelled
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3h 54m layover in Chicago (ORD) · 90 min minimum on separate tickets
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14:30 ORD → 17:19 SFOUA 1577 · United · 4h 49m · 74% on time, 1.1% cancelled
Total trip 10h 11m, scheduled departure to arrival (San Francisco is 2 h behind St Louis). Times are local. Both flew on 51 of the last 56 days.
Makes the connection99%The first flight arrived more than 144 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 54m layover.
Arrives on time72%First flight not cancelled (0.0% are) × connection made (99%) × second flight not cancelled (1.1% are) and within 15 minutes (74%).
Total trip10h 11mSTL 09:08 to SFO 17:19, 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.