Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → San Francisco via Miami: arrives on time 12%
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14:24 ORD → 18:39 MIAAA 3148 · American · 3h 19m · 51% on time, 1.4% cancelled
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51m layover in Miami (MIA) · 45 min minimum on one ticket
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19:30 MIA → 22:34 SFOAA 2799 · American · 6h 04m · 33% on time, 0.0% cancelled
Total trip 10h 10m, scheduled departure to arrival (San Francisco is 2 h behind Chicago). Times are local. Both flew on 52 of the last 56 days.
Makes the connection37%The first flight arrived more than 6 minutes late on 63% of the days it flew: too late for the 45-minute minimum connection on a 51m layover.
Arrives on time12%First flight not cancelled (1.4% are) × connection made (37%) × second flight not cancelled (0.0% are) and within 15 minutes (33%).
Total trip10h 10mORD 14:24 to SFO 22:34, 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.