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

Ontario → Miami via Atlanta: arrives on time 65%

  1. 11:50 ONT → 19:11 ATL
    DL 665 · Delta · 4h 21m · 85% on time, 1.6% cancelled
  2. 3h 38m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 22:49 ATL → 00:51 MIA +1 day
    DL 1589 · Delta · 2h 02m · 69% on time, 3.4% cancelled

Total trip 10h 01m, scheduled departure to arrival (Miami is 3 h ahead of Ontario). Times are local. Both flew on 56 of the last 56 days.

Makes the connection99%The first flight arrived more than 173 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 3h 38m layover.
Arrives on time65%First flight not cancelled (1.6% are) × connection made (99%) × second flight not cancelled (3.4% are) and within 15 minutes (69%).
Total trip10h 01mONT 11:50 to MIA 00:51, 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.