Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Juan → New York via Detroit: arrives on time 52%
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14:14 SJU → 18:53 DTWDL 1913 · Delta · 4h 39m · 86% on time, 1.6% cancelled
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1h 17m layover in Detroit (DTW) · 45 min minimum on one ticket
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20:10 DTW → 22:16 JFKDL 1316 · Delta · 2h 03m · 62% on time, 6.3% cancelled
Total trip 7h 59m, scheduled departure to arrival. Times are local. Both flew on 49 of the last 56 days.
Makes the connection92%The first flight arrived more than 32 minutes late on 8% of the days it flew: too late for the 45-minute minimum connection on a 1h 17m layover.
Arrives on time52%First flight not cancelled (1.6% are) × connection made (92%) × second flight not cancelled (6.3% are) and within 15 minutes (62%).
Total trip7h 59mSJU 14:14 to JFK 22:16, 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.