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

Ontario → New York via Seattle: arrives on time 79%

  1. 17:59 ONT → 20:50 SEA
    DL 4031 · Delta, flown by SkyWest · 2h 51m · 90% on time, 0.3% cancelled
  2. 1h 30m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 22:20 SEA → 06:34 JFK +1 day
    DL 452 · Delta · 5h 14m · 86% on time, 3.0% cancelled

Total trip 9h 35m, scheduled departure to arrival (New York is 3 h ahead of Ontario). Times are local. Both flew on 55 of the last 56 days.

Makes the connection95%The first flight arrived more than 45 minutes late on 5% of the days it flew: too late for the 45-minute minimum connection on a 1h 30m layover.
Arrives on time79%First flight not cancelled (0.3% are) × connection made (95%) × second flight not cancelled (3.0% are) and within 15 minutes (86%).
Total trip9h 35mONT 17:59 to JFK 06:34, 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.