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

Ontario → Miami via Atlanta: arrives on time 62%

  1. 11:50 ONT → 19:11 ATL
    DL 665 · Delta · 4h 21m · 85% on time, 1.6% cancelled
  2. 2h 26m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 21:37 ATL → 23:39 MIA
    DL 1234 · Delta · 2h 02m · 65% on time, 0.7% cancelled

Total trip 8h 49m, scheduled departure to arrival (Miami is 3 h ahead of Ontario). Times are local. Both flew on 21 of the last 56 days.

Makes the connection97%The first flight arrived more than 101 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 2h 26m layover.
Arrives on time62%First flight not cancelled (1.6% are) × connection made (97%) × second flight not cancelled (0.7% are) and within 15 minutes (65%).
Total trip8h 49mONT 11:50 to MIA 23:39, 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.