Historical on-time performance
Spokane to Salt Lake City
546 miData through May 2026Source: US DOT · BTS
Flights on GEG–SLC arrive on time 90% of the time over the last 12 months.
On-time rate90%arrived within 15 min
p90 delay10 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 1,635 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time93%Medianon timep90on timeCancel0.4%Flights701
- Delta Air LinesOn-time87%Medianon timep9015 minCancel0.7%Flights934
Why flights run late
Delay causes
- Airline43%
- Weather12%
- Air traffic (NAS)4%
- Late aircraft40%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline70%
- Weather30%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 10 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 → SLC
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 — 91% on time.
- Mornings91% on time · p90 10 min · 1,551 flights
- Evenings88% on time · p90 15 min · 1,555 flights
- Middays87% on time · p90 20 min · 1,690 flights
- Afternoons87% on time · p90 15 min · 211 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 87% to 91% on time.
- Thursdays91% on time · p90 10 min · 728 flights
- Tuesdays90% on time · p90 10 min · 729 flights
- Wednesdays89% on time · p90 15 min · 728 flights
- Mondays88% on time · p90 15 min · 730 flights
- Sundays88% on time · p90 15 min · 725 flights
- Fridays87% on time · p90 15 min · 735 flights
- Saturdays87% on time · p90 25 min · 632 flights
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