Historical on-time performance
Chicago to Billings
1,060 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–BIL arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 393 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.
- 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.
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 (2023-01 .. 2025-12).
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 · 416 flights
- Middays79% on time · p90 40 min · 89 flights · limited
- Overnights74% on time · p90 60 min · 115 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 91% on time.
- Tuesdays91% on time · p90 10 min · 87 flights · limited
- Mondays82% on time · p90 30 min · 88 flights · limited
- Sundays81% on time · p90 20 min · 90 flights · limited
- Fridays79% on time · p90 35 min · 91 flights · limited
- Saturdays77% on time · p90 35 min · 92 flights · limited
- Wednesdays76% on time · p90 30 min · 88 flights · limited
- Thursdays74% on time · p90 40 min · 92 flights · limited
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