Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Boston → San Francisco via Charlotte: arrives on time 30%

  1. 16:47 BOS → 19:29 CLT
    AA 1573 · American · 2h 42m · 67% on time, 2.8% cancelled
  2. 49m layover in Charlotte (CLT) · 45 min minimum on one ticket
  3. 20:18 CLT → 22:48 SFO
    AA 1580 · American · 5h 30m · 51% on time, 0.6% cancelled

Total trip 9h 01m, scheduled departure to arrival (San Francisco is 3 h behind Boston). Times are local. Both flew on 55 of the last 56 days.

Makes the connection61%The first flight arrived more than 4 minutes late on 39% of the days it flew: too late for the 45-minute minimum connection on a 49m layover.
Arrives on time30%First flight not cancelled (2.8% are) × connection made (61%) × second flight not cancelled (0.6% are) and within 15 minutes (51%).
Total trip9h 01mBOS 16:47 to SFO 22:48, 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.