Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Columbus via Boston: arrives on time 84%
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08:35 IAD → 10:20 BOSUA 641 · United · 1h 45m · 92% on time, 1.5% cancelled
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2h 20m layover in Boston (BOS) · 90 min minimum on separate tickets
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12:40 BOS → 14:56 CMHAA 3470 · American, flown by Envoy · 2h 16m · 89% on time, 0.0% cancelled
Total trip 6h 21m, scheduled departure to arrival. Times are local. Both flew on 56 of the last 56 days.
Makes the connection96%The first flight arrived more than 50 minutes late on 4% 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 (1.5% are) × connection made (96%) × second flight not cancelled (0.0% are) and within 15 minutes (89%).
Total trip6h 21mIAD 08:35 to CMH 14:56, 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.