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

Portland → Chicago via Detroit: arrives on time 46%

  1. 11:55 PDX → 19:08 DTW
    DL 2171 · Delta · 4h 13m · 83% on time, 0.0% cancelled
  2. 52m layover in Detroit (DTW) · 45 min minimum on one ticket
  3. 20:00 DTW → 20:31 ORD
    DL 1665 · Delta · 1h 31m · 66% on time, 3.3% cancelled

Total trip 6h 36m, scheduled departure to arrival (Chicago is 2 h ahead of Portland). Times are local. Both flew on 55 of the last 56 days.

Makes the connection72%The first flight arrived more than 7 minutes late on 28% of the days it flew: too late for the 45-minute minimum connection on a 52m layover.
Arrives on time46%First flight not cancelled (0.0% are) × connection made (72%) × second flight not cancelled (3.3% are) and within 15 minutes (66%).
Total trip6h 36mPDX 11:55 to ORD 20:31, 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.