Historical on-time performance
Boise to Chicago
1,437 miData through Dec 2025Source: US DOT · BTS
Flights on BOI–ORD arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 747 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time77%Medianon timep9045 minCancel0.0%Flights183
- SkyWest AirlinesbestOn-time88%Medianon timep9015 minCancel0.6%Flights473
- Envoy AirOn-time65%Median5 minp9065 minCancel0.0%Flights31
- American AirlinesOn-time63%Medianon timep90110 minCancel0.0%Flights60
Why flights run late
Delay causes
- Airline38%
- Weather6%
- Air traffic (NAS)32%
- Late aircraft25%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BOI → ORD
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 15 min · 654 flights
- Middays79% on time · p90 40 min · 1,300 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 85% on time.
- Tuesdays85% on time · p90 30 min · 275 flights
- Saturdays84% on time · p90 25 min · 284 flights
- Mondays84% on time · p90 20 min · 284 flights
- Thursdays84% on time · p90 25 min · 280 flights
- Sundays80% on time · p90 45 min · 280 flights
- Fridays79% on time · p90 30 min · 280 flights
- Wednesdays76% on time · p90 50 min · 272 flights
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