Historical on-time performance
Seattle to Spokane
224 miData through May 2026Source: US DOT · BTS
Flights on SEA–GEG arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 5,188 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time86%Medianon timep9020 minCancel1.0%Flights3,128
- Alaska AirlinesOn-time73%Medianon timep9035 minCancel0.8%Flights1,846
- Delta Air LinesOn-time70%Medianon timep9050 minCancel0.5%Flights214
Why flights run late
Delay causes
- Airline41%
- Weather15%
- Air traffic (NAS)12%
- Late aircraft31%
- Security1%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline25%
- Weather46%
- Air traffic (NAS)29%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 48 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 SEA → GEG
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 86% on time.
- Mornings86% on time · p90 20 min · 2,841 flights
- Evenings81% on time · p90 30 min · 3,354 flights
- Middays80% on time · p90 30 min · 3,840 flights
- Afternoons79% on time · p90 30 min · 1,911 flights
- Overnights75% on time · p90 35 min · 3,679 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 84% on time.
- Tuesdays84% on time · p90 25 min · 2,237 flights
- Wednesdays83% on time · p90 25 min · 2,228 flights
- Saturdays82% on time · p90 25 min · 2,030 flights
- Mondays79% on time · p90 30 min · 2,299 flights
- Thursdays77% on time · p90 30 min · 2,298 flights
- Fridays77% on time · p90 35 min · 2,285 flights
- Sundays77% on time · p90 35 min · 2,248 flights
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