Historical on-time performance
San Francisco to Austin
1,504 miData through Dec 2025Source: US DOT · BTS
Flights on SFO–AUS arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 2,555 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-time86%Medianon timep9020 minCancel0.6%Flights1,566
- Alaska AirlinesOn-time83%Medianon timep9030 minCancel0.6%Flights683
- Southwest AirlinesOn-time41%Median20 minp9085 minCancel0.0%Flights122
- Delta Air LinesOn-time55%Median10 minp9065 minCancel1.6%Flights184
Why flights run late
Delay causes
- Airline26%
- Weather2%
- Air traffic (NAS)22%
- Late aircraft49%
- 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 SFO → AUS
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 — 90% on time.
- Mornings90% on time · p90 10 min · 2,178 flights
- Overnights84% on time · p90 25 min · 408 flights
- Evenings79% on time · p90 40 min · 1,816 flights
- Afternoons75% on time · p90 40 min · 233 flights
- Middays74% on time · p90 50 min · 2,049 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 86% on time.
- Saturdays86% on time · p90 15 min · 841 flights
- Tuesdays84% on time · p90 25 min · 940 flights
- Mondays81% on time · p90 30 min · 999 flights
- Wednesdays81% on time · p90 40 min · 952 flights
- Sundays80% on time · p90 35 min · 970 flights
- Fridays79% on time · p90 40 min · 984 flights
- Thursdays78% on time · p90 35 min · 998 flights
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