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

Ontario → Miami via Atlanta: arrives on time 56%

  1. 11:50 ONT → 19:11 ATL
    DL 665 · Delta · 4h 21m · 85% on time, 1.6% cancelled
  2. 1h 05m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 20:16 ATL → 22:17 MIA
    DL 1588 · Delta · 2h 01m · 66% on time, 1.1% cancelled

Total trip 7h 27m, 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 connection87%The first flight arrived more than 20 minutes late on 13% of the days it flew: too late for the 45-minute minimum connection on a 1h 05m layover.
Arrives on time56%First flight not cancelled (1.6% are) × connection made (87%) × second flight not cancelled (1.1% are) and within 15 minutes (66%).
Total trip7h 27mONT 11:50 to MIA 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.