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

Ontario → Chicago via San Francisco: arrives on time 50%

  1. 13:50 ONT → 15:15 SFO
    UA 1375 · United · 1h 25m · 57% on time, 0.0% cancelled
  2. 1h 06m layover in San Francisco (SFO) · 45 min minimum on one ticket
  3. 16:21 SFO → 22:59 ORD
    UA 1482 · United · 4h 38m · 81% on time, 0.4% cancelled

Total trip 7h 09m, scheduled departure to arrival (Chicago is 2 h ahead of Ontario). Times are local. Both flew on 37 of the last 56 days.

Makes the connection62%The first flight arrived more than 21 minutes late on 38% of the days it flew: too late for the 45-minute minimum connection on a 1h 06m layover.
Arrives on time50%First flight not cancelled (0.0% are) × connection made (62%) × second flight not cancelled (0.4% are) and within 15 minutes (81%).
Total trip7h 09mONT 13:50 to ORD 22:59, layover included

Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.