BZN to ORD flight delays & on-time performance
Nonstop flights from Bozeman Yellowstone International Airport to Chicago O'Hare International Airport · 1,185 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BZN or ORD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Bozeman (BZN) to Chicago (ORD) arrived on time 73% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.1% were cancelled, and 11% arrived an hour or more late.
- United Airlines was the most punctual airline here (79% on time); American Airlines was the least (66%).
- Departures scheduled around 8am did best (87% on time); around 1pm did worst (59%).
- Tuesday was the most reliable day to fly (78% on time) and Sunday the least (69%).
- The largest source of delay minutes was late-arriving aircraft (37%).
Which airline is most on time from BZN to ORD?
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 | 79% | 1.5% | 19 min | 9.1% | 689 |
| Envoy AirRegional airline operating American Eagle flights. | 76% | 0.0% | 18 min | 4.9% | 41 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 71% | 0.0% | 17 min | 8.7% | 69 |
| American Airlines | 66% | 0.9% | 34 min | 14.5% | 468 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am87%101 flights
- 8am87%227 flights
- 10am69%39 flights
- 11am70%20 flights
- 12pm75%410 flights
- 1pm59%225 flights
- 3pm80%30 flights
- 4pm67%154 flights
- 5pm63%60 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%1.1% cancelled
- Tuesday78%2.3% cancelled
- Wednesday74%0.0% cancelled
- Thursday76%0.6% cancelled
- Friday72%1.0% cancelled
- Saturday71%1.6% cancelled
- Sunday69%1.0% 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 aircraft37%
- Air traffic control & airport congestion35%
- Airline (crew, maintenance, cleaning, fueling)23%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather64%
- Airline (crew, maintenance, cleaning, fueling)36%
- Air traffic control & airport congestion0%
- Security0%
BZN to ORD: common questions
- How often are BZN to ORD flights on time?
- 73% 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 Bozeman to Chicago cancelled?
- 1.1% of scheduled flights were cancelled (14 of 1,267).
- How long are typical delays?
- Across all flights the average arrival delay was 25 min (early arrivals count as zero). Flights that were late arrived 90 min behind schedule on average, and 10.9% of flights were an hour or more late.
- How long is taxi time at BZN?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ORD to BZN — 69% on time
More flights from Bozeman
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BZN → ORD, nonstop flights by US airlines that report to the DOT. How we calculate this.