Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Miami → St Louis via Chicago: arrives on time 25%
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19:21 MIA → 22:01 ORDAA 3304 · American · 3h 40m · 49% on time, 1.4% cancelled
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59m layover in Chicago (ORD) · 45 min minimum on one ticket
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23:00 ORD → 00:16 STL +1 dayAA 1004 · American · 1h 16m · 58% on time, 6.9% cancelled
Total trip 5h 55m, scheduled departure to arrival (St Louis is 1 h behind Miami). Times are local. Both flew on 56 of the last 56 days.
Makes the connection47%The first flight arrived more than 14 minutes late on 53% of the days it flew: too late for the 45-minute minimum connection on a 59m layover.
Arrives on time25%First flight not cancelled (1.4% are) × connection made (47%) × second flight not cancelled (6.9% are) and within 15 minutes (58%).
Total trip5h 55mMIA 19:21 to STL 00:16, 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.