Historical on-time performance
Portland to Spokane
279 miData through Dec 2025Source: US DOT · BTS
Flights on PDX–GEG arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 751 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time87%Medianon timep9015 minCancel0.5%Flights429
- Alaska AirlinesOn-time80%Medianon timep9025 minCancel0.9%Flights322
Why flights run late
Delay causes
- Airline32%
- Weather8%
- Air traffic (NAS)18%
- Late aircraft38%
- Security4%
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 PDX → GEG
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 78% to 87% on time.
- Evenings87% on time · p90 15 min · 132 flights · limited
- Afternoons86% on time · p90 15 min · 375 flights
- Overnights85% on time · p90 20 min · 360 flights
- Middays80% on time · p90 30 min · 582 flights
- Mornings78% on time · p90 40 min · 147 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 88% on time.
- Wednesdays88% on time · p90 20 min · 240 flights
- Saturdays87% on time · p90 20 min · 188 flights · limited
- Mondays85% on time · p90 20 min · 235 flights
- Tuesdays85% on time · p90 25 min · 234 flights
- Sundays83% on time · p90 25 min · 245 flights
- Thursdays78% on time · p90 35 min · 222 flights
- Fridays77% on time · p90 35 min · 232 flights
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