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

Chicago → Portland via Atlanta: arrives on time 41%

  1. 11:23 ORD → 14:25 ATL
    DL 1147 · Delta · 2h 04m · 80% on time, 3.1% cancelled
  2. 52m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 15:17 ATL → 17:54 PWM
    DL 488 · Delta · 2h 36m · 59% on time, 4.3% cancelled

Total trip 5h 30m, scheduled departure to arrival (Portland is 1 h ahead of Chicago). Times are local. Both flew on 55 of the last 56 days.

Makes the connection75%The first flight arrived more than 7 minutes late on 25% of the days it flew: too late for the 45-minute minimum connection on a 52m layover.
Arrives on time41%First flight not cancelled (3.1% are) × connection made (75%) × second flight not cancelled (4.3% are) and within 15 minutes (59%).
Total trip5h 30mORD 11:23 to PWM 17:54, 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.