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

Boston → Louisville via Newark: arrives on time 23%

  1. 17:44 BOS → 19:15 EWR
    UA 1647 · United · 1h 31m · 41% on time, 3.3% cancelled
  2. 1h 10m layover in Newark (EWR) · 45 min minimum on one ticket
  3. 20:25 EWR → 22:50 SDF
    UA 3512 · United, flown by Republic · 2h 25m · 56% on time, 13.5% cancelled

Total trip 5h 06m, scheduled departure to arrival. Times are local. Both flew on 32 of the last 56 days.

Makes the connection49%The first flight arrived more than 25 minutes late on 51% of the days it flew: too late for the 45-minute minimum connection on a 1h 10m layover.
Arrives on time23%First flight not cancelled (3.3% are) × connection made (49%) × second flight not cancelled (13.5% are) and within 15 minutes (56%).
Total trip5h 06mBOS 17:44 to SDF 22:50, 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.