Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Juan → Boston via Dulles: arrives on time 72%
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16:55 SJU → 20:56 IADUA 2024 · United · 4h 01m · 86% on time, 0.6% cancelled
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1h 14m layover in Dulles (IAD) · 45 min minimum on one ticket
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22:10 IAD → 23:59 BOSUA 755 · United · 1h 49m · 81% on time, 2.2% cancelled
Total trip 7h 04m, scheduled departure to arrival. Times are local. Both flew on 54 of the last 56 days.
Makes the connection91%The first flight arrived more than 29 minutes late on 9% of the days it flew: too late for the 45-minute minimum connection on a 1h 14m layover.
Arrives on time72%First flight not cancelled (0.6% are) × connection made (91%) × second flight not cancelled (2.2% are) and within 15 minutes (81%).
Total trip7h 04mSJU 16:55 to BOS 23:59, 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.