Boise to Chicago

What the Data Says About BOI to ORD

The Boise to Chicago corridor (BOI → ORD) covers roughly 1,437 miles and is served by 21 carriers, based on Bureau of Transportation Statistics reporting. Across 5,058 flights in the dataset, this route posts a 84.7% on-time rate with an average delay of 85.3 minutes when flights run late. Over the most recent 24 months of BTS data, 1,546 flights were recorded on this pairing — 6 cancelled (0.4%) and 10 diverted (0.6%). Those baseline metrics tell you what to expect before you book.

Having 21 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 5,058 total flights analyzed, the 84.7% on-time figure is statistically meaningful rather than a small-sample fluke. The 85.3-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Jan 2025 posted the best performance on this corridor at 98% on-time, while Nov 2025 came in at 69% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the BOI to ORD route, the combination of a 84.7% on-time rate, 85.3-minute average delay, 0.4% recent cancellation rate, and 21 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.