Historical on-time performance
San Jose to Salt Lake City
584 miData through May 2026Source: US DOT · BTS
Flights on SJC–SLC arrive on time 93% of the time over the last 12 months.
On-time rate93%arrived within 15 min
p90 delay5 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 1,594 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time95%Medianon timep90on timeCancel0.1%Flights671
- Delta Air LinesOn-time91%Medianon timep905 minCancel0.8%Flights893
- Southwest AirlinesOn-time90%Medianon timep9010 minCancel0.0%Flights30
Why flights run late
Delay causes
- Airline59%
- Weather3%
- Air traffic (NAS)1%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline88%
- Weather0%
- Air traffic (NAS)13%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 8 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 SJC → 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 — 94% on time.
- Mornings94% on time · p90 on time · 1,700 flights
- Evenings92% on time · p90 5 min · 1,231 flights
- Middays90% on time · p90 15 min · 2,023 flights
- Afternoons87% on time · p90 20 min · 519 flights
Best day of week
Tuesdays are the most reliable day to fly this route — 95% on time.
- Tuesdays95% on time · p90 on time · 743 flights
- Wednesdays91% on time · p90 5 min · 739 flights
- Saturdays91% on time · p90 5 min · 693 flights
- Fridays91% on time · p90 10 min · 832 flights
- Mondays91% on time · p90 10 min · 823 flights
- Thursdays90% on time · p90 10 min · 824 flights
- Sundays90% on time · p90 10 min · 819 flights
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