Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Boston via Chicago: arrives on time 59%
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10:31 IAD → 11:53 ORDUA 1252 · United · 2h 22m · 92% on time, 0.8% cancelled
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1h 00m layover in Chicago (ORD) · 45 min minimum on one ticket
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12:53 ORD → 16:29 BOSUA 794 · United · 2h 36m · 67% on time, 2.8% cancelled
Total trip 5h 58m, scheduled departure to arrival. Times are local. Both flew on 56 of the last 56 days.
Makes the connection92%The first flight arrived more than 15 minutes late on 8% of the days it flew: too late for the 45-minute minimum connection on a 1h 00m layover.
Arrives on time59%First flight not cancelled (0.8% are) × connection made (92%) × second flight not cancelled (2.8% are) and within 15 minutes (67%).
Total trip5h 58mIAD 10:31 to BOS 16:29, 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.