Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → Buffalo via Boston: arrives on time 87%
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08:30 ORD → 12:07 BOSAA 4106 · American, flown by Envoy · 2h 37m · 91% on time, 0.0% cancelled
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1h 48m layover in Boston (BOS) · 45 min minimum on one ticket
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13:55 BOS → 15:44 BUFAA 4440 · American, flown by Republic · 1h 49m · 88% on time, 0.0% cancelled
Total trip 6h 14m, scheduled departure to arrival (Buffalo is 1 h ahead of Chicago). Times are local. Both flew on 40 of the last 56 days.
Makes the connection99%The first flight arrived more than 63 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 1h 48m layover.
Arrives on time87%First flight not cancelled (0.0% are) × connection made (99%) × second flight not cancelled (0.0% are) and within 15 minutes (88%).
Total trip6h 14mORD 08:30 to BUF 15:44, 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.