Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Juan → Boston via New York: arrives on time 72%
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07:05 SJU → 11:01 JFKDL 1854 · Delta · 3h 56m · 93% on time, 1.1% cancelled
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3h 29m layover in New York (JFK) · 45 min minimum on one ticket
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14:30 JFK → 16:08 BOSDL 5595 · Delta, flown by Republic · 1h 38m · 79% on time, 6.2% cancelled
Total trip 9h 03m, scheduled departure to arrival. Times are local. Both flew on 56 of the last 56 days.
Makes the connection98%The first flight arrived more than 164 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 3h 29m layover.
Arrives on time72%First flight not cancelled (1.1% are) × connection made (98%) × second flight not cancelled (6.2% are) and within 15 minutes (79%).
Total trip9h 03mSJU 07:05 to BOS 16:08, 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.