Historical on-time performance
Chicago to Missoula
Flights on ORD–MSO arrive on time 78% of the time over the last 12 months.
based on 435 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- United AirlinesOn-time87%Medianon timep9020 minCancel0.0%Flights92
- Envoy AirOn-time76%Medianon timep9045 minCancel0.3%Flights343
Why flights run late
Delay causes
- Airline24%
- Weather21%
- Air traffic (NAS)25%
- Late aircraft30%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 1 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 → MSO
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 80% on time.
- Mornings80% on time · p90 30 min · 830 flights
- Overnights66% on time · p90 75 min · 108 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 87% on time.
- Tuesdays87% on time · p90 35 min · 135 flights · limited
- Thursdays80% on time · p90 30 min · 145 flights · limited
- Saturdays79% on time · p90 30 min · 146 flights · limited
- Wednesdays78% on time · p90 45 min · 139 flights · limited
- Mondays76% on time · p90 35 min · 143 flights · limited
- Sundays74% on time · p90 50 min · 145 flights · limited
- Fridays74% on time · p90 35 min · 145 flights · limited
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