Historical on-time performance
Spokane to Boise
287 miData through May 2026Source: US DOT · BTS
Flights on GEG–BOI arrive on time 88% of the time over the last 12 months.
On-time rate88%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 276 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time88%Medianon timep9015 minCancel0.4%Flights276
Why flights run late
Delay causes
- Airline17%
- Weather5%
- Air traffic (NAS)6%
- Late aircraft71%
- 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 GEG → BOI
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 84% to 92% on time.
- Mornings92% on time · p90 5 min · 321 flights
- Afternoons90% on time · p90 10 min · 451 flights
- Middays87% on time · p90 15 min · 416 flights
- Evenings84% on time · p90 35 min · 275 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 85% to 93% on time.
- Saturdays93% on time · p90 10 min · 142 flights · limited
- Tuesdays92% on time · p90 10 min · 200 flights
- Thursdays88% on time · p90 15 min · 231 flights
- Wednesdays88% on time · p90 15 min · 206 flights
- Mondays87% on time · p90 15 min · 237 flights
- Fridays87% on time · p90 25 min · 235 flights
- Sundays85% on time · p90 30 min · 212 flights
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