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

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

Historically, 72.4% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,255 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
72.4%arrived on time
17.7%30+ min late
1.0%cancelled
1,255scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.6%all scheduled flights
120+ minutes late4.7%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+14.7 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning32885.7%6.4%2.1%
Late morning7969.6%20.3%0.0%
Afternoon81967.3%21.9%0.7%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday18874.5%16.5%1.1%
Tuesday17375.1%15.6%2.3%
Wednesday15476.0%17.5%0.0%
Thursday17374.6%15.0%0.6%
Friday18669.9%19.9%1.1%
Saturday18972.5%18.0%1.1%
Sunday19265.1%20.8%1.0%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines65878.1%13.5%1.5%
American Airlines46764.2%24.4%0.6%
SkyWest Airlines8970.8%13.5%0.0%
Envoy Air4175.6%17.1%0.0%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202514264.1%21.8%1.4%
August 202514467.4%16.7%2.8%
September 202513376.7%17.3%0.0%
October 202511582.6%7.8%0.9%
November 20253167.7%29.0%0.0%
December 20258367.5%27.7%0.0%
January 202610368.0%16.5%1.0%
February 20269679.2%12.5%0.0%
March 202611669.8%23.3%1.7%
April 20264766.0%19.1%2.1%
May 20269586.3%9.5%1.1%
June 202615070.7%19.3%0.7%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline25.7%
Late aircraft36.8%
National airspace31.9%
Weather5.5%
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.