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

Bismarck/Mandan, ND (BIS) to Chicago, IL (ORD) flight delay odds

74.1% of 274 official scheduled BIS-to-ORD flights arrived on time; 17.5% arrived at least 30 minutes late and 0.4% 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
17.5%30+ min late
0.4%cancelled
274scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.7%all scheduled flights
120+ minutes late3.6%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+8.5 mincompleted flights

Which departure time was most reliable for BIS to ORD?

Only Afternoon met the BIS-to-ORD departure window threshold: 74.0% of 273 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Afternoon27374.0%17.6%0.4%

Which weekday was most reliable for BIS to ORD?

Among qualifying BIS-to-ORD weekday results, Saturday had the highest on-time rate: 84.6% of 39 flights. Sunday was lowest at 64.1% across 39 flights.

DayFlightsOn time30+ minCancelled
Monday3964.1%25.6%2.6%
Tuesday4077.5%15.0%0.0%
Wednesday3969.2%20.5%0.0%
Thursday3976.9%17.9%0.0%
Friday3982.1%15.4%0.0%
Saturday3984.6%12.8%0.0%
Sunday3964.1%15.4%0.0%

Which airline was most reliable for BIS to ORD?

Only Envoy Air met the BIS-to-ORD airline threshold: 74.1% of 270 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Envoy Air27074.1%17.4%0.4%
SkyWest Airlines475.0%25.0%0.0%

Which month was most reliable for BIS to ORD?

Among qualifying BIS-to-ORD month results, May 2026 had the highest on-time rate: 87.1% of 31 flights. July 2025 was lowest at 41.9% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253141.9%29.0%0.0%
August 20253183.9%6.5%0.0%
September 20253086.7%10.0%0.0%
October 20253171.0%19.4%0.0%
November 20253080.0%16.7%0.0%
December 20253161.3%29.0%3.2%
April 20262479.2%16.7%0.0%
May 20263187.1%9.7%0.0%
June 20263073.3%23.3%0.0%

What drove BIS to ORD delay minutes?

Late aircraft was the largest recorded BIS-to-ORD delay category, accounting for 51.0% of 5,427 BTS-attributed delay minutes during July 2025–June 2026.

Airline12.3%
Late aircraft51.0%
National airspace20.5%
Weather15.3%
Security0.9%
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.