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

Ontario → Chicago via Denver: arrives on time 77%

  1. 13:18 ONT → 16:38 DEN
    UA 1263 · United · 2h 20m · 84% on time, 0.5% cancelled
  2. 3h 50m layover in Denver (DEN) · 45 min minimum on one ticket
  3. 20:28 DEN → 23:59 ORD
    UA 377 · United · 2h 31m · 80% on time, 0.4% cancelled

Total trip 8h 41m, scheduled departure to arrival (Chicago is 2 h ahead of Ontario). Times are local. Both flew on 0 of the last 56 days, too few to list among the best connections.

Makes the connection97%The first flight arrived more than 185 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 3h 50m layover.
Arrives on time77%First flight not cancelled (0.5% are) × connection made (97%) × second flight not cancelled (0.4% are) and within 15 minutes (80%).
Total trip8h 41mONT 13:18 to ORD 23:59, 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.