Chicago (ORD) to Bozeman (BZN): On-Time Performance
Data through July 2026
When you fly ORD to BZN matters as much as anything else about the booking: the route swung from 93% on-time in September 2024 to just 51% in March 2026. Across the full period the route averages 71% on-time against a national 78%. Morning departures also hold up better than evening ones (77% vs 54%), which matters most in the rough months.
- On-time
- 71%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 3.5
- last 12 months
- Duration
- 3h 26m
- scheduled
- Distance
- 1,185 mi
Best airline from ORD to BZN
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 77% | 14 min | 0.0% | 218 |
| United Airlines | 73% | 19 min | 1.0% | 1,266 |
| Envoy Air | 67% | 11 min | 0.0% | 86 |
| American Airlines | 66% | 22 min | 0.4% | 777 |
Monthly on-time trend
Best time to fly from ORD to BZN
Aim for departures around 7 a.m. (82% on-time); avoid 7 p.m. departures (50%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 18 min |
| Tuesdaybest | 79% | 15 min |
| Wednesday | 73% | 17 min |
| Thursday | 73% | 19 min |
| Friday | 63% | 26 min |
| Saturday | 74% | 17 min |
| Sunday | 65% | 22 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft44%
- Airline operations28%
- National airspace system22%
- Weather6%
Frequently asked questions
- How often are flights from ORD to BZN delayed?
- 29% of ORD–BZN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 19 minutes.
- Which airline is most reliable from ORD to BZN?
- SkyWest Airlines has the best on-time record on this route at 77%, based on 218 flights. 4 airlines flew ORD–BZN frequently enough to compare in this period.
- What is the best time of day to fly from ORD to BZN?
- Departures around 7 a.m. have the best record (82% on-time), while departures around 7 p.m. have the worst (50%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ORD to BZN?
- The scheduled ORD–BZN flight time averages 3h 26m over 1,185 miles. Actual arrival times vary — flights on this route land 15+ minutes late 29% of the time.
- How often are ORD to BZN flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from ORD to BZN?
- March 2026 was the roughest month in this dataset, with only 51% of arrivals on time. The best was September 2024 at 93%. If your dates are flexible, that 42-point gap is worth planning around.
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Based on 2,347 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.