Historical on-time performance
Chicago to Bozeman
Flights on ORD–BZN arrive on time 66% of the time over the last 12 months.
based on 1,042 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time68%Medianon timep9055 minCancel1.1%Flights628
- American AirlinesOn-time63%Medianon timep9075 minCancel0.5%Flights414
Why flights run late
Delay causes
- Airline26%
- Weather5%
- Air traffic (NAS)22%
- Late aircraft48%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline22%
- Weather78%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 9 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → BZN
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 56% to 81% on time.
- Mornings81% on time · p90 30 min · 1,363 flights
- Afternoons74% on time · p90 45 min · 154 flights · limited
- Middays71% on time · p90 60 min · 772 flights
- Overnights60% on time · p90 70 min · 253 flights
- Evenings56% on time · p90 100 min · 321 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 65% to 80% on time.
- Tuesdays80% on time · p90 35 min · 342 flights
- Mondays77% on time · p90 45 min · 393 flights
- Wednesdays77% on time · p90 40 min · 375 flights
- Thursdays75% on time · p90 50 min · 421 flights
- Saturdays75% on time · p90 50 min · 456 flights
- Sundays68% on time · p90 55 min · 427 flights
- Fridays65% on time · p90 70 min · 449 flights
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