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

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

83.6% of 274 official scheduled ORD-to-BIS flights arrived on time; 10.9% arrived at least 30 minutes late and 0.0% 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 SIGNALLower disruption
83.6%arrived on time
10.9%30+ min late
0.0%cancelled
274scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.1%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival-4.0 mincompleted flights

Which departure time was most reliable for ORD to BIS?

Only Late morning met the ORD-to-BIS departure window threshold: 83.5% of 273 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Late morning27383.5%11.0%0.0%

Which weekday was most reliable for ORD to BIS?

Among qualifying ORD-to-BIS weekday results, Friday had the highest on-time rate: 87.2% of 39 flights. Wednesday was lowest at 79.5% across 39 flights.

DayFlightsOn time30+ minCancelled
Monday3984.6%10.3%0.0%
Tuesday4080.0%17.5%0.0%
Wednesday3979.5%10.3%0.0%
Thursday3984.6%5.1%0.0%
Friday3987.2%12.8%0.0%
Saturday3987.2%7.7%0.0%
Sunday3982.1%12.8%0.0%

Which airline was most reliable for ORD to BIS?

Only Envoy Air met the ORD-to-BIS airline threshold: 83.3% of 270 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Envoy Air27083.3%11.1%0.0%
SkyWest Airlines4100.0%0.0%0.0%

Which month was most reliable for ORD to BIS?

Among qualifying ORD-to-BIS month results, June 2026 had the highest on-time rate: 96.7% of 30 flights. July 2025 was lowest at 61.3% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253161.3%25.8%0.0%
August 20253193.5%3.2%0.0%
September 20253090.0%3.3%0.0%
October 20253174.2%12.9%0.0%
November 20253086.7%13.3%0.0%
December 20253167.7%22.6%0.0%
April 20262491.7%8.3%0.0%
May 20263190.3%6.5%0.0%
June 20263096.7%3.3%0.0%

What drove ORD to BIS delay minutes?

Late aircraft was the largest recorded ORD-to-BIS delay category, accounting for 35.4% of 2,707 BTS-attributed delay minutes during July 2025–June 2026.

Airline21.8%
Late aircraft35.4%
National airspace23.9%
Weather18.9%
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.