Route
ORD → MSO
Chicago O'Hare International Airport Missoula Montana Airport
1,332 miles
Return route MSO → ORD →
How punctual is this route?
- On-time arrivals
- 80.1%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 472
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 31%
- Air traffic control & airport 31%
- Airline (crew, maintenance, cleaning) 23%
- Extreme weather 15%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.5% | 73 |
| October 2025 | 85.3% | 34 |
| December 2025 | 30.8% | 14 |
| January 2026 | 71.0% | 31 |
| February 2026 | 50.0% | 28 |
| March 2026 | 60.0% | 31 |
| April 2026 | 80.0% | 30 |
| May 2026 | 97.6% | 42 |
| June 2026 | 89.8% | 60 |
| July 2026 | 89.4% | 67 |
| August 2026 | 75.8% | 62 |
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 | 315 | 77.3% | 0.0% | 55 min |
| United Airlines | 83 | 91.5% | 1.2% | 92 min |
| SkyWest Airlines | 74 | 79.2% | 1.4% | 56 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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