Historical on-time performance
Salt Lake City to Spokane
546 miData through Dec 2025Source: US DOT · BTS
Flights on SLC–GEG arrive on time 86% of the time over the last 12 months.
On-time rate86%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 1,646 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time83%Medianon timep9030 minCancel0.4%Flights1,021
- SkyWest AirlinesbestOn-time92%Medianon timep905 minCancel0.0%Flights625
Why flights run late
Delay causes
- Airline70%
- Weather4%
- Air traffic (NAS)5%
- Late aircraft21%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SLC → GEG
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 91% on time.
- Mornings91% on time · p90 5 min · 1,053 flights
- Middays85% on time · p90 25 min · 1,094 flights
- Afternoons85% on time · p90 25 min · 1,072 flights
- Evenings83% on time · p90 35 min · 752 flights
- Overnights83% on time · p90 25 min · 1,095 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 83% to 88% on time.
- Thursdays88% on time · p90 20 min · 734 flights
- Saturdays87% on time · p90 15 min · 636 flights
- Mondays86% on time · p90 25 min · 743 flights
- Tuesdays86% on time · p90 20 min · 742 flights
- Wednesdays86% on time · p90 20 min · 741 flights
- Fridays83% on time · p90 25 min · 739 flights
- Sundays83% on time · p90 30 min · 731 flights
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