Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Philadelphia → San Francisco via Atlanta: arrives on time 30%
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13:32 PHL → 15:57 ATLF9 1101 · Frontier · 2h 25m · 60% on time, 0.5% cancelled
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58m layover in Atlanta (ATL) · 45 min minimum on one ticket
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16:55 ATL → 19:26 SFOF9 1447 · Frontier · 5h 34m · 53% on time, 1.3% cancelled
Total trip 8h 57m, scheduled departure to arrival (San Francisco is 3 h behind Philadelphia). Times are local. Both flew on 54 of the last 56 days.
Makes the connection59%The first flight arrived more than 13 minutes late on 41% of the days it flew: too late for the 45-minute minimum connection on a 58m layover.
Arrives on time30%First flight not cancelled (0.5% are) × connection made (59%) × second flight not cancelled (1.3% are) and within 15 minutes (53%).
Total trip8h 57mPHL 13:32 to SFO 19:26, 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.