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

Chicago, IL (ORD) to Bozeman, MT (BZN) flight delay odds

66.6% of 1,256 official scheduled ORD-to-BZN flights arrived on time; 21.9% arrived at least 30 minutes late and 0.7% 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
66.6%arrived on time
21.9%30+ min late
0.7%cancelled
1,256scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.2%all scheduled flights
120+ minutes late3.9%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+15.8 mincompleted flights

Which departure time was most reliable for ORD to BZN?

Among qualifying ORD-to-BZN departure window results, Early morning had the highest on-time rate: 72.5% of 91 flights. Evening was lowest at 49.1% across 226 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning9172.5%17.6%0.0%
Late morning65871.6%18.2%0.5%
Afternoon28167.3%21.0%0.0%
Evening22649.1%35.4%2.7%

Which weekday was most reliable for ORD to BZN?

Among qualifying ORD-to-BZN weekday results, Tuesday had the highest on-time rate: 71.7% of 159 flights. Friday was lowest at 58.1% across 191 flights.

DayFlightsOn time30+ minCancelled
Monday18769.5%21.9%0.5%
Tuesday15971.7%18.2%0.6%
Wednesday15471.4%16.2%0.6%
Thursday18868.6%21.8%0.5%
Friday19158.1%26.2%0.5%
Saturday18966.7%24.3%0.5%
Sunday18862.2%22.9%1.6%

Which airline was most reliable for ORD to BZN?

Among qualifying ORD-to-BZN airline results, SkyWest Airlines had the highest on-time rate: 74.2% of 89 flights. Envoy Air was lowest at 53.7% across 41 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines65868.7%20.5%1.1%
American Airlines46863.5%24.8%0.4%
SkyWest Airlines8974.2%18.0%0.0%
Envoy Air4153.7%19.5%0.0%

Which month was most reliable for ORD to BZN?

Among qualifying ORD-to-BZN month results, November 2025 had the highest on-time rate: 83.9% of 31 flights. March 2026 was lowest at 50.4% across 115 flights.

MonthFlightsOn time30+ minCancelled
July 202514256.3%23.9%1.4%
August 202514468.8%18.8%2.8%
September 202513379.7%13.5%0.0%
October 202511467.5%16.7%0.0%
November 20253183.9%9.7%0.0%
December 20258457.1%29.8%0.0%
January 202610456.7%31.7%1.0%
February 20269666.7%24.0%0.0%
March 202611550.4%40.0%0.9%
April 20264872.9%12.5%2.1%
May 20269580.0%10.5%0.0%
June 202615072.7%20.7%0.0%

What drove ORD to BZN delay minutes?

Late aircraft was the largest recorded ORD-to-BZN delay category, accounting for 45.2% of 25,278 BTS-attributed delay minutes during July 2025–June 2026.

Airline25.3%
Late aircraft45.2%
National airspace23.4%
Weather6.0%
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.