Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → San Juan via Atlanta: arrives on time 42%
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06:00 BOS → 09:06 ATLF9 3085 · Frontier · 3h 06m · 65% on time, 4.3% cancelled
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1h 19m layover in Atlanta (ATL) · 45 min minimum on one ticket
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10:25 ATL → 14:15 SJUF9 2082 · Frontier · 3h 50m · 57% on time, 1.6% cancelled
Total trip 8h 15m, scheduled departure to arrival. Times are local. Both flew on 30 of the last 56 days.
Makes the connection79%The first flight arrived more than 34 minutes late on 21% of the days it flew: too late for the 45-minute minimum connection on a 1h 19m layover.
Arrives on time42%First flight not cancelled (4.3% are) × connection made (79%) × second flight not cancelled (1.6% are) and within 15 minutes (57%).
Total trip8h 15mBOS 06:00 to SJU 14:15, 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.