Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Juan → Detroit via Atlanta: arrives on time 64%
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17:56 SJU → 21:54 ATLDL 1946 · Delta · 3h 59m · 88% on time, 0.5% cancelled
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1h 05m layover in Atlanta (ATL) · 45 min minimum on one ticket
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22:59 ATL → 00:59 DTW +1 dayDL 2940 · Delta · 2h 00m · 73% on time, 0.8% cancelled
Total trip 7h 03m, scheduled departure to arrival. Times are local. Both flew on 48 of the last 56 days.
Makes the connection90%The first flight arrived more than 20 minutes late on 10% of the days it flew: too late for the 45-minute minimum connection on a 1h 05m layover.
Arrives on time64%First flight not cancelled (0.5% are) × connection made (90%) × second flight not cancelled (0.8% are) and within 15 minutes (73%).
Total trip7h 03mSJU 17:56 to DTW 00:59, 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.