Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → St Louis via Chicago: arrives on time 84%
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08:15 BOS → 10:12 ORDUA 1834 · United · 2h 57m · 92% on time, 0.0% cancelled
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2h 20m layover in Chicago (ORD) · 90 min minimum on separate tickets
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12:32 ORD → 13:55 STLAA 3815 · American, flown by Envoy · 1h 23m · 86% on time, 1.5% cancelled
Total trip 6h 40m, scheduled departure to arrival (St Louis is 1 h behind Boston). Times are local. Both flew on 49 of the last 56 days.
Makes the connection98%The first flight arrived more than 50 minutes late on 2% of the days it flew: too late for the 90-minute minimum connection on a 2h 20m layover.
Arrives on time84%First flight not cancelled (0.0% are) × connection made (98%) × second flight not cancelled (1.5% are) and within 15 minutes (86%).
Total trip6h 40mBOS 08:15 to STL 13:55, 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.