Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Detroit → San Juan via Dulles: arrives on time 74%
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06:00 DTW → 07:34 IADUA 4058 · United, flown by Mesa · 1h 34m · 88% on time, 0.0% cancelled
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1h 00m layover in Dulles (IAD) · 45 min minimum on one ticket
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08:34 IAD → 12:34 SJUUA 2021 · United · 4h 00m · 85% on time, 0.6% cancelled
Total trip 6h 34m, scheduled departure to arrival. Times are local. Both flew on 26 of the last 56 days.
Makes the connection88%The first flight arrived more than 15 minutes late on 12% of the days it flew: too late for the 45-minute minimum connection on a 1h 00m layover.
Arrives on time74%First flight not cancelled (0.0% are) × connection made (88%) × second flight not cancelled (0.6% are) and within 15 minutes (85%).
Total trip6h 34mDTW 06:00 to SJU 12:34, 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.