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

Billings, MT (BIL) to Chicago, IL (ORD) flight delay odds

77.0% of 379 official scheduled BIL-to-ORD flights arrived on time; 14.2% arrived at least 30 minutes late and 0.3% 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 SIGNALGenerally reliable
77.0%arrived on time
14.2%30+ min late
0.3%cancelled
379scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.4%all scheduled flights
120+ minutes late3.2%all scheduled flights
Diverted1.3%did not reach as scheduled
Average arrival+19.5 mincompleted flights

Which departure time was most reliable for BIL to ORD?

Among qualifying BIL-to-ORD departure window results, Early morning had the highest on-time rate: 87.8% of 98 flights. Afternoon was lowest at 71.2% across 250 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning9887.8%6.1%1.0%
Afternoon25071.2%18.0%0.0%

Which weekday was most reliable for BIL to ORD?

Among qualifying BIL-to-ORD weekday results, Tuesday had the highest on-time rate: 85.5% of 55 flights. Wednesday was lowest at 68.5% across 54 flights.

DayFlightsOn time30+ minCancelled
Monday5381.1%7.5%0.0%
Tuesday5585.5%5.5%0.0%
Wednesday5468.5%20.4%0.0%
Thursday5580.0%9.1%0.0%
Friday5475.9%22.2%0.0%
Saturday5572.7%16.4%0.0%
Sunday5375.5%18.9%1.9%

Which airline was most reliable for BIL to ORD?

Among qualifying BIL-to-ORD airline results, Envoy Air had the highest on-time rate: 77.1% of 262 flights. SkyWest Airlines was lowest at 76.9% across 117 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air26277.1%14.9%0.4%
SkyWest Airlines11776.9%12.8%0.0%

Which month was most reliable for BIL to ORD?

Among qualifying BIL-to-ORD month results, October 2025 had the highest on-time rate: 85.2% of 61 flights. July 2025 was lowest at 68.8% across 93 flights.

MonthFlightsOn time30+ minCancelled
July 20259368.8%22.6%0.0%
August 20259377.4%15.1%1.1%
September 20259080.0%7.8%0.0%
October 20256185.2%11.5%0.0%
June 20263070.0%16.7%0.0%

What drove BIL to ORD delay minutes?

Airline was the largest recorded BIL-to-ORD delay category, accounting for 70.9% of 9,579 BTS-attributed delay minutes during July 2025–June 2026.

Airline70.9%
Late aircraft10.8%
National airspace12.5%
Weather5.9%
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.