BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BOI→ORD

Boise, ID (BOI) to Chicago, IL (ORD) flight delay odds

74.1% of 1,111 official scheduled BOI-to-ORD flights arrived on time; 15.8% arrived at least 30 minutes late and 1.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
74.1%arrived on time
15.8%30+ min late
1.0%cancelled
1,111scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.5%all scheduled flights
120+ minutes late4.7%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+12.5 mincompleted flights

Which departure time was most reliable for BOI to ORD?

Among qualifying BOI-to-ORD departure window results, Early morning had the highest on-time rate: 83.1% of 384 flights. Afternoon was lowest at 69.2% across 725 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning38483.1%7.6%1.8%
Afternoon72569.2%20.1%0.6%

Which weekday was most reliable for BOI to ORD?

Among qualifying BOI-to-ORD weekday results, Tuesday had the highest on-time rate: 80.9% of 162 flights. Friday was lowest at 65.6% across 157 flights.

DayFlightsOn time30+ minCancelled
Monday15972.3%18.9%0.6%
Tuesday16280.9%12.3%0.6%
Wednesday15770.7%15.9%0.6%
Thursday15878.5%10.8%1.3%
Friday15765.6%21.0%0.0%
Saturday15879.1%10.8%1.9%
Sunday16071.2%20.6%1.9%

Which airline was most reliable for BOI to ORD?

Among qualifying BOI-to-ORD airline results, SkyWest Airlines had the highest on-time rate: 81.5% of 507 flights. American Airlines was lowest at 61.0% across 172 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines50781.5%9.5%1.8%
United Airlines24475.8%14.8%0.8%
Envoy Air18863.8%28.7%0.0%
American Airlines17261.0%21.5%0.0%

Which month was most reliable for BOI to ORD?

Among qualifying BOI-to-ORD month results, February 2026 had the highest on-time rate: 90.5% of 84 flights. April 2026 was lowest at 64.8% across 91 flights.

MonthFlightsOn time30+ minCancelled
July 20259371.0%18.3%0.0%
August 20259367.7%15.1%0.0%
September 20259172.5%13.2%0.0%
October 20259284.8%7.6%0.0%
November 20258865.9%26.1%3.4%
December 202510471.2%20.2%1.0%
January 20269878.6%14.3%1.0%
February 20268490.5%3.6%0.0%
March 20269372.0%19.4%4.3%
April 20269164.8%20.9%1.1%
May 20269378.5%9.7%0.0%
June 20269172.5%19.8%1.1%

What drove BOI to ORD delay minutes?

Late aircraft was the largest recorded BOI-to-ORD delay category, accounting for 33.6% of 23,236 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.1%
Late aircraft33.6%
National airspace24.5%
Weather15.8%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.