Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Juan → Detroit via Atlanta: arrives on time 38%
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17:15 SJU → 21:35 ATLF9 2871 · Frontier · 4h 20m · 54% on time, 2.0% cancelled
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1h 00m layover in Atlanta (ATL) · 45 min minimum on one ticket
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22:35 ATL → 00:40 DTW +1 dayF9 1264 · Frontier · 2h 05m · 72% on time, 1.1% cancelled
Total trip 7h 25m, scheduled departure to arrival. Times are local. Both flew on 53 of the last 56 days.
Makes the connection54%The first flight arrived more than 15 minutes late on 46% of the days it flew: too late for the 45-minute minimum connection on a 1h 00m layover.
Arrives on time38%First flight not cancelled (2.0% are) × connection made (54%) × second flight not cancelled (1.1% are) and within 15 minutes (72%).
Total trip7h 25mSJU 17:15 to DTW 00:40, 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.