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

Ontario → Chicago via Seattle: arrives on time 66%

  1. 06:20 ONT → 09:17 SEA
    DL 3816 · Delta, flown by SkyWest · 2h 57m · 94% on time, 0.0% cancelled
  2. 1h 18m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 10:35 SEA → 16:45 ORD
    DL 637 · Delta · 4h 10m · 72% on time, 1.9% cancelled

Total trip 8h 25m, scheduled departure to arrival (Chicago is 2 h ahead of Ontario). Times are local. Both flew on 56 of the last 56 days.

Makes the connection94%The first flight arrived more than 33 minutes late on 6% of the days it flew: too late for the 45-minute minimum connection on a 1h 18m layover.
Arrives on time66%First flight not cancelled (0.0% are) × connection made (94%) × second flight not cancelled (1.9% are) and within 15 minutes (72%).
Total trip8h 25mONT 06:20 to ORD 16:45, 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.