Route
BIS → ORD
Bismarck Municipal Airport Chicago O'Hare International Airport
715 miles
Return route ORD → BIS →
How punctual is this route?
- On-time arrivals
- 76.4%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 104 min
- Flights arriving 15+ minutes late
- Flights tracked
- 274
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 47%
- Extreme weather 22%
- Air traffic control & airport 21%
- Airline (crew, maintenance, cleaning) 10%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 86.7% | 30 |
| October 2025 | 71.0% | 31 |
| November 2025 | 80.0% | 30 |
| December 2025 | 63.3% | 31 |
| January 2026 | 100.0% | 5 |
| April 2026 | 79.2% | 24 |
| May 2026 | 87.1% | 31 |
| June 2026 | 73.3% | 30 |
| July 2026 | 79.3% | 31 |
| August 2026 | 64.5% | 31 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Envoy Air | 270 | 76.4% | 0.4% | 105 min |
| SkyWest Airlines | 4 | 75.0% | 0.0% | 40 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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