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

Chicago → Boise via Seattle: arrives on time 40%

  1. 17:55 ORD → 20:34 SEA
    DL 637 · Delta · 4h 39m · 60% on time, 2.0% cancelled
  2. 46m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 21:20 SEA → 23:51 BOI
    DL 4090 · Delta, flown by SkyWest · 1h 31m · 85% on time, 0.6% cancelled

Total trip 6h 56m, scheduled departure to arrival (Boise is 1 h behind Chicago). Times are local. Both flew on 40 of the last 56 days.

Makes the connection48%The first flight arrived more than 1 minutes late on 52% of the days it flew: too late for the 45-minute minimum connection on a 46m layover.
Arrives on time40%First flight not cancelled (2.0% are) × connection made (48%) × second flight not cancelled (0.6% are) and within 15 minutes (85%).
Total trip6h 56mORD 17:55 to BOI 23:51, layover included

Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.