Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
St Louis → Chicago via San Francisco: arrives on time 18%
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19:23 STL → 21:43 SFOUA 2482 · United · 4h 20m · 26% on time, 0.0% cancelled
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55m layover in San Francisco (SFO) · 45 min minimum on one ticket
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22:38 SFO → 05:01 ORD +1 dayUA 2278 · United · 4h 23m · 81% on time, 2.4% cancelled
Total trip 9h 38m, scheduled departure to arrival. Times are local. Both flew on 56 of the last 56 days.
Makes the connection22%The first flight arrived more than 10 minutes late on 78% of the days it flew: too late for the 45-minute minimum connection on a 55m layover.
Arrives on time18%First flight not cancelled (0.0% are) × connection made (22%) × second flight not cancelled (2.4% are) and within 15 minutes (81%).
Total trip9h 38mSTL 19:23 to ORD 05:01, 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.