Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Juan → Boston via New York: arrives on time 39%
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12:04 SJU → 15:59 JFKB6 1104 · JetBlue · 4h 00m · 75% on time, 3.4% cancelled
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1h 31m layover in New York (JFK) · 90 min minimum on separate tickets
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17:30 JFK → 19:14 BOSDL 5798 · Delta, flown by Republic · 1h 44m · 63% on time, 3.8% cancelled
Total trip 7h 10m, scheduled departure to arrival. Times are local. Both flew on 22 of the last 56 days.
Makes the connection66%The first flight arrived more than 1 minutes late on 34% of the days it flew: too late for the 90-minute minimum connection on a 1h 31m layover.
Arrives on time39%First flight not cancelled (3.4% are) × connection made (66%) × second flight not cancelled (3.8% are) and within 15 minutes (63%).
Total trip7h 10mSJU 12:04 to BOS 19:14, layover included
Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.