Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → Denver via Chicago: arrives on time 94%
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05:10 BOS → 07:04 ORDAA 3324 · American · 2h 54m · 92% on time, 2.2% cancelled
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3h 50m layover in Chicago (ORD) · 90 min minimum on separate tickets
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10:54 ORD → 12:45 DENUA 581 · United · 2h 51m · 97% on time, 0.0% cancelled
Total trip 9h 35m, scheduled departure to arrival (Denver is 2 h behind Boston). Times are local. Both flew on 37 of the last 56 days.
Makes the connection99%The first flight arrived more than 140 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 50m layover.
Arrives on time94%First flight not cancelled (2.2% are) × connection made (99%) × second flight not cancelled (0.0% are) and within 15 minutes (97%).
Total trip9h 35mBOS 05:10 to DEN 12:45, 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.