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

Ontario → Chicago via Seattle: arrives on time 73%

  1. 11:59 ONT → 14:53 SEA
    DL 4070 · Delta, flown by SkyWest · 3h 01m · 91% on time, 0.0% cancelled
  2. 2h 47m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 17:40 SEA → 23:39 ORD
    DL 2108 · Delta · 3h 59m · 76% on time, 1.4% cancelled

Total trip 9h 40m, scheduled departure to arrival (Chicago is 2 h ahead of Ontario). Times are local. Both flew on 45 of the last 56 days.

Makes the connection97%The first flight arrived more than 122 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 2h 47m layover.
Arrives on time73%First flight not cancelled (0.0% are) × connection made (97%) × second flight not cancelled (1.4% are) and within 15 minutes (76%).
Total trip9h 40mONT 11:59 to ORD 23:39, 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.