Historical on-time performance
Salt Lake City to San Antonio
1,087 miData through Dec 2025Source: US DOT · BTS
Flights on SLC–SAT arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 998 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 timep9025 minCancel0.8%Flights998
Why flights run late
Delay causes
- Airline63%
- Weather1%
- Air traffic (NAS)12%
- Late aircraft25%
- 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 → SAT
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 — 86% on time.
- Mornings86% on time · p90 20 min · 795 flights
- Middays82% on time · p90 30 min · 1,033 flights
- Evenings81% on time · p90 35 min · 259 flights
- Overnights78% on time · p90 35 min · 836 flights
- Afternoons70% on time · p90 55 min · 135 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 84% on time.
- Saturdays84% on time · p90 20 min · 349 flights
- Wednesdays84% on time · p90 25 min · 449 flights
- Tuesdays83% on time · p90 30 min · 449 flights
- Sundays81% on time · p90 30 min · 445 flights
- Mondays80% on time · p90 30 min · 457 flights
- Fridays80% on time · p90 30 min · 454 flights
- Thursdays80% on time · p90 35 min · 455 flights
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