Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → San Juan via New York: arrives on time 56%
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12:10 DEN → 18:25 JFKDL 532 · Delta · 4h 18m · 85% on time, 4.5% cancelled
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1h 00m layover in New York (JFK) · 45 min minimum on one ticket
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19:25 JFK → 23:43 SJUDL 1859 · Delta · 4h 18m · 70% on time, 2.2% cancelled
Total trip 9h 33m, scheduled departure to arrival (San Juan is 2 h ahead of Denver). Times are local. Both flew on 56 of the last 56 days.
Makes the connection85%The first flight arrived more than 15 minutes late on 15% of the days it flew: too late for the 45-minute minimum connection on a 1h 00m layover.
Arrives on time56%First flight not cancelled (4.5% are) × connection made (85%) × second flight not cancelled (2.2% are) and within 15 minutes (70%).
Total trip9h 33mDEN 12:10 to SJU 23:43, 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.