Historical on-time performance
San Francisco to Salt Lake City
Flights on SFO–SLC arrive on time 78% of the time over the last 12 months.
based on 3,287 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time80%Medianon timep9030 minCancel0.0%Flights415
- Delta Air LinesOn-time79%Medianon timep9045 minCancel0.8%Flights1,709
- SkyWest AirlinesOn-time77%Medianon timep9040 minCancel1.1%Flights1,163
Why flights run late
Delay causes
- Airline35%
- Weather2%
- Air traffic (NAS)15%
- Late aircraft48%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline48%
- Weather4%
- Air traffic (NAS)48%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 27 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 SFO → 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 — 90% on time.
- Mornings90% on time · p90 10 min · 2,721 flights
- Evenings80% on time · p90 45 min · 3,140 flights
- Overnights79% on time · p90 40 min · 127 flights · limited
- Middays73% on time · p90 50 min · 3,173 flights
- Afternoons72% on time · p90 50 min · 1,381 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 83% on time.
- Tuesdays83% on time · p90 30 min · 1,418 flights
- Saturdays83% on time · p90 35 min · 1,367 flights
- Wednesdays81% on time · p90 40 min · 1,458 flights
- Sundays79% on time · p90 45 min · 1,579 flights
- Thursdays78% on time · p90 40 min · 1,572 flights
- Fridays77% on time · p90 45 min · 1,575 flights
- Mondays76% on time · p90 50 min · 1,573 flights
Keep exploring