Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Ontario → Miami via Seattle: arrives on time 78%

  1. 06:20 ONT → 09:17 SEA
    DL 3816 · Delta, flown by SkyWest · 2h 57m · 94% on time, 0.0% cancelled
  2. 3h 39m layover in Seattle (SEA) · 90 min minimum on separate tickets
  3. 12:56 SEA → 21:55 MIA
    AA 654 · American · 5h 59m · 80% on time, 1.4% cancelled

Total trip 12h 35m, 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 129 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 39m layover.
Arrives on time78%First flight not cancelled (0.0% are) × connection made (99%) × second flight not cancelled (1.4% are) and within 15 minutes (80%).
Total trip12h 35mONT 06:20 to MIA 21:55, 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.