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

Ontario → Chicago via Atlanta: arrives on time 71%

  1. 11:50 ONT → 19:11 ATL
    DL 665 · Delta · 4h 21m · 85% on time, 1.6% cancelled
  2. 2h 04m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 21:15 ATL → 22:17 MDW
    DL 1076 · Delta · 2h 02m · 77% on time, 2.5% cancelled

Total trip 8h 27m, 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 connection95%The first flight arrived more than 79 minutes late on 5% of the days it flew: too late for the 45-minute minimum connection on a 2h 04m layover.
Arrives on time71%First flight not cancelled (1.6% are) × connection made (95%) × second flight not cancelled (2.5% are) and within 15 minutes (77%).
Total trip8h 27mONT 11:50 to MDW 22:17, 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.