Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Salt Lake City → Boston via Dulles: arrives on time 87%
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23:59 SLC → 06:13 IADUA 726 · United · 4h 14m · 95% on time, 2.4% cancelled
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2h 22m layover in Dulles (IAD) · 45 min minimum on one ticket
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08:35 IAD → 10:20 BOS +1 dayUA 641 · United · 1h 45m · 92% on time, 1.5% cancelled
Total trip 8h 21m, scheduled departure to arrival (Boston is 2 h ahead of Salt Lake City). Times are local. Both flew on 25 of the last 56 days.
Makes the connection98%The first flight arrived more than 97 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 2h 22m layover.
Arrives on time87%First flight not cancelled (2.4% are) × connection made (98%) × second flight not cancelled (1.5% are) and within 15 minutes (92%).
Total trip8h 21mSLC 23:59 to BOS 10:20, 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.