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

Chicago → Boise via Atlanta: arrives on time 45%

15:22 ORD → 18:36 ATL

DL 1477 · Delta · 2h 13m · 76% on time, 1.7% cancelled
54m layover in Atlanta (ATL) · 45 min minimum on one ticket
19:30 ATL → 21:57 BOI

DL 704 · Delta · 4h 27m · 63% on time, 0.0% cancelled

Total trip 7h 35m, scheduled departure to arrival (Boise is 1 h behind Chicago). Times are local. Both flew on 40 of the last 56 days.

Makes the connection72%The first flight arrived more than 9 minutes late on 28% of the days it flew: too late for the 45-minute minimum connection on a 54m layover.

Arrives on time45%First flight not cancelled (1.7% are) × connection made (72%) × second flight not cancelled (0.0% are) and within 15 minutes (63%).

Total trip7h 35mORD 15:22 to BOI 21:57, 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.