Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → St Louis via Chicago: arrives on time 42%
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18:31 BOS → 21:00 ORDAA 1554 · American · 3h 29m · 61% on time, 6.9% cancelled
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2h 00m 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 6h 45m, scheduled departure to arrival (St Louis is 1 h behind Boston). Times are local. Both flew on 56 of the last 56 days.
Makes the connection84%The first flight arrived more than 75 minutes late on 16% of the days it flew: too late for the 45-minute minimum connection on a 2h 00m layover.
Arrives on time42%First flight not cancelled (6.9% are) × connection made (84%) × second flight not cancelled (6.9% are) and within 15 minutes (58%).
Total trip6h 45mBOS 18:31 to STL 00:16, 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.