Historical on-time performance
San Antonio to Salt Lake City
1,086 miData through Dec 2025Source: US DOT · BTS
Flights on SAT–SLC arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 999 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 minCancel0.9%Flights999
Why flights run late
Delay causes
- Airline46%
- Weather1%
- Air traffic (NAS)5%
- Late aircraft48%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SAT → SLC
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 — 93% on time.
- Mornings93% on time · p90 on time · 1,096 flights
- Afternoons83% on time · p90 35 min · 447 flights
- Middays80% on time · p90 35 min · 596 flights
- Evenings80% on time · p90 50 min · 913 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 82% to 89% on time.
- Wednesdays89% on time · p90 15 min · 449 flights
- Tuesdays87% on time · p90 25 min · 448 flights
- Saturdays85% on time · p90 20 min · 349 flights
- Fridays84% on time · p90 30 min · 455 flights
- Thursdays84% on time · p90 30 min · 455 flights
- Mondays84% on time · p90 30 min · 457 flights
- Sundays82% on time · p90 35 min · 445 flights
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