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

Boise → Ontario via Seattle: arrives on time 67%

  1. 18:10 BOI → 18:54 SEA
    DL 4127 · Delta, flown by SkyWest · 1h 44m · 83% on time, 0.6% cancelled
  2. 56m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 19:50 SEA → 22:41 ONT
    DL 3884 · Delta, flown by SkyWest · 2h 51m · 84% on time, 0.0% cancelled

Total trip 5h 31m, scheduled departure to arrival (Ontario is 1 h behind Boise). Times are local. Both flew on 55 of the last 56 days.

Makes the connection81%The first flight arrived more than 11 minutes late on 19% of the days it flew: too late for the 45-minute minimum connection on a 56m layover.
Arrives on time67%First flight not cancelled (0.6% are) × connection made (81%) × second flight not cancelled (0.0% are) and within 15 minutes (84%).
Total trip5h 31mBOI 18:10 to ONT 22:41, 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.