Historical on-time performance
Seattle to Austin
1,770 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–AUS arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 2,019 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time80%Medianon timep9035 minCancel0.8%Flights868
- Alaska AirlinesOn-time72%Medianon timep9040 minCancel0.4%Flights1,151
Why flights run late
Delay causes
- Airline47%
- Weather2%
- Air traffic (NAS)26%
- Late aircraft26%
- 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 SEA → AUS
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 70% to 82% on time.
- Mornings82% on time · p90 20 min · 2,065 flights
- Early mornings82% on time · p90 30 min · 213 flights
- Overnights78% on time · p90 25 min · 503 flights
- Middays72% on time · p90 45 min · 1,804 flights
- Evenings70% on time · p90 45 min · 1,494 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 82% on time.
- Tuesdays82% on time · p90 25 min · 873 flights
- Wednesdays81% on time · p90 30 min · 879 flights
- Sundays76% on time · p90 35 min · 883 flights
- Saturdays75% on time · p90 35 min · 788 flights
- Thursdays74% on time · p90 40 min · 883 flights
- Fridays73% on time · p90 45 min · 888 flights
- Mondays71% on time · p90 45 min · 902 flights
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