tailodds FORECAST
Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Chicago → Ontario via Seattle: arrives on time 86%

  1. 08:02 ORD → 10:37 SEA
    AS 587 · Alaska · 4h 35m · 64% on time, 0.4% cancelled
  2. 3h 58m layover in Seattle (SEA) · 90 min minimum on separate tickets
  3. 14:35 SEA → 17:19 ONT
    DL 4031 · Delta, flown by SkyWest · 2h 44m · 88% on time, 0.3% cancelled

Total trip 11h 17m, scheduled departure to arrival (Ontario is 2 h behind Chicago). Times are local. Both flew on 51 of the last 56 days.

Makes the connection98%The first flight arrived more than 148 minutes late on 2% of the days it flew: too late for the 90-minute minimum connection on a 3h 58m layover.
Arrives on time86%First flight not cancelled (0.4% are) × connection made (98%) × second flight not cancelled (0.3% are) and within 15 minutes (88%).
Total trip11h 17mORD 08:02 to ONT 17:19, 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.