Historical on-time performance
Spokane to Sacramento
649 miData through May 2026Source: US DOT · BTS
Flights on GEG–SMF arrive on time 87% of the time over the last 12 months.
On-time rate87%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 656 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time87%Medianon timep9020 minCancel0.2%Flights656
Why flights run late
Delay causes
- Airline29%
- Weather0%
- Air traffic (NAS)5%
- Late aircraft58%
- Security8%
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 → SMF
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 — 97% on time.
- Mornings97% on time · p90 on time · 580 flights
- Middays86% on time · p90 20 min · 536 flights
- Afternoons80% on time · p90 25 min · 261 flights
- Evenings76% on time · p90 35 min · 482 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 83% to 89% on time.
- Saturdays89% on time · p90 15 min · 187 flights · limited
- Tuesdays89% on time · p90 15 min · 259 flights
- Wednesdays88% on time · p90 15 min · 254 flights
- Thursdays85% on time · p90 20 min · 295 flights
- Sundays85% on time · p90 25 min · 294 flights
- Mondays83% on time · p90 20 min · 295 flights
- Fridays83% on time · p90 20 min · 301 flights
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