ORD to BZN flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Bozeman Yellowstone International Airport · 1,185 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or BZN right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to Bozeman (BZN) arrived on time 69% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.8% were cancelled, and 11% arrived an hour or more late.
- United Airlines was the most punctual airline here (72% on time); American Airlines was the least (65%).
- Departures scheduled around 9am did best (79% on time); around 7pm did worst (47%).
- Tuesday was the most reliable day to fly (76% on time) and Friday the least (61%).
- The largest source of delay minutes was late-arriving aircraft (44%).
Which airline is most on time from ORD to BZN?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 72% | 1.0% | 21 min | 9.4% | 689 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 72% | 0.0% | 19 min | 10.3% | 69 |
| American Airlines | 65% | 0.6% | 24 min | 15.3% | 469 |
| Envoy AirRegional airline operating American Eagle flights. | 55% | 0.0% | 15 min | 0.0% | 41 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am77%40 flights
- 8am66%30 flights
- 9am79%360 flights
- 10am67%266 flights
- 11am87%30 flights
- 12pm78%91 flights
- 1pm61%124 flights
- 4pm70%91 flights
- 7pm47%119 flights
- 8pm58%105 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday70%1.1% cancelled
- Tuesday76%0.6% cancelled
- Wednesday75%0.6% cancelled
- Thursday72%0.5% cancelled
- Friday61%1.0% cancelled
- Saturday67%0.5% cancelled
- Sunday65%1.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft44%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)24%
- Extreme weather7%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather90%
- Airline (crew, maintenance, cleaning, fueling)10%
- Air traffic control & airport congestion0%
- Security0%
ORD to BZN: common questions
- How often are ORD to BZN flights on time?
- 69% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to Bozeman cancelled?
- 0.8% of scheduled flights were cancelled (10 of 1,268).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 11.4% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 28 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BZN to ORD — 73% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → BZN, nonstop flights by US airlines that report to the DOT. How we calculate this.