Historical on-time performance
Chicago to Billings
Flights on ORD–BIL arrive on time 78% of the time over the last 12 months.
based on 393 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.
- Envoy AirOn-time79%Medianon timep9040 minCancel0.7%Flights271
- SkyWest AirlinesOn-time76%Medianon timep9030 minCancel0.0%Flights122
Why flights run late
Delay causes
- Airline34%
- Weather9%
- Air traffic (NAS)14%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather50%
- Air traffic (NAS)50%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 2 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 → BIL
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 74% to 82% on time.
- Mornings82% on time · p90 25 min · 427 flights
- Overnights74% on time · p90 60 min · 115 flights · limited
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