Historical on-time performance
Austin to Salt Lake City
1,085 miData through Dec 2025Source: US DOT · BTS
Flights on AUS–SLC arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 1,547 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time85%Medianon timep9030 minCancel0.4%Flights1,074
- Southwest AirlinesOn-time74%Medianon timep9035 minCancel0.0%Flights473
Why flights run late
Delay causes
- Airline50%
- Weather1%
- Air traffic (NAS)5%
- Late aircraft44%
- 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 AUS → 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 — 92% on time.
- Mornings92% on time · p90 5 min · 1,611 flights
- Middays85% on time · p90 25 min · 1,611 flights
- Overnights74% on time · p90 65 min · 91 flights · limited
- Evenings73% on time · p90 55 min · 1,156 flights
- Afternoons72% on time · p90 35 min · 571 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 84% on time.
- Tuesdays84% on time · p90 20 min · 715 flights
- Sundays83% on time · p90 25 min · 721 flights
- Thursdays83% on time · p90 30 min · 753 flights
- Wednesdays83% on time · p90 25 min · 711 flights
- Saturdays83% on time · p90 30 min · 616 flights
- Fridays82% on time · p90 35 min · 758 flights
- Mondays81% on time · p90 30 min · 766 flights
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