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

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

67.9% of 1,108 official scheduled ORD-to-BOI flights arrived on time; 20.2% arrived at least 30 minutes late and 1.3% 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 SIGNALVariable
67.9%arrived on time
20.2%30+ min late
1.3%cancelled
1,108scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late12.2%all scheduled flights
120+ minutes late4.3%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+15.4 mincompleted flights

Which departure time was most reliable for ORD to BOI?

Among qualifying ORD-to-BOI departure window results, Early morning had the highest on-time rate: 79.9% of 274 flights. Evening was lowest at 54.7% across 327 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning27479.9%13.5%0.4%
Late morning45269.7%18.1%0.0%
Afternoon5472.2%18.5%0.0%
Evening32754.7%29.1%3.7%

Which weekday was most reliable for ORD to BOI?

Among qualifying ORD-to-BOI weekday results, Saturday had the highest on-time rate: 72.2% of 158 flights. Friday was lowest at 59.7% across 159 flights.

DayFlightsOn time30+ minCancelled
Monday15863.9%20.9%2.5%
Tuesday16172.0%17.4%0.6%
Wednesday15769.4%20.4%0.6%
Thursday15772.0%17.2%1.9%
Friday15959.7%27.7%1.3%
Saturday15872.2%16.5%0.6%
Sunday15865.8%21.5%1.3%

Which airline was most reliable for ORD to BOI?

Among qualifying ORD-to-BOI airline results, American Airlines had the highest on-time rate: 77.9% of 172 flights. SkyWest Airlines was lowest at 60.4% across 503 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines50360.4%25.6%2.6%
United Airlines24577.6%13.1%0.4%
Envoy Air18866.0%20.7%0.0%
American Airlines17277.9%14.0%0.0%

Which month was most reliable for ORD to BOI?

Among qualifying ORD-to-BOI month results, September 2025 had the highest on-time rate: 85.6% of 90 flights. December 2025 was lowest at 39.6% across 106 flights.

MonthFlightsOn time30+ minCancelled
July 20259371.0%21.5%0.0%
August 20259373.1%17.2%1.1%
September 20259085.6%11.1%0.0%
October 20259280.4%13.0%0.0%
November 20258868.2%19.3%2.3%
December 202510639.6%44.3%0.9%
January 20269654.2%28.1%1.0%
February 20268469.0%16.7%0.0%
March 20269355.9%26.9%4.3%
April 20269074.4%13.3%2.2%
May 20269375.3%12.9%0.0%
June 20269073.3%13.3%3.3%

What drove ORD to BOI delay minutes?

Airline was the largest recorded ORD-to-BOI delay category, accounting for 38.1% of 24,558 BTS-attributed delay minutes during July 2025–June 2026.

Airline38.1%
Late aircraft34.4%
National airspace21.1%
Weather6.5%
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.