Historical on-time performance
Austin to Seattle
1,770 miData through May 2026Source: US DOT · BTS
Flights on AUS–SEA arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 2,055 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time84%Medianon timep9030 minCancel1.0%Flights929
- Alaska AirlinesOn-time80%Medianon timep9030 minCancel1.0%Flights1,126
Why flights run late
Delay causes
- Airline40%
- Weather5%
- Air traffic (NAS)16%
- Late aircraft38%
- Security1%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline70%
- Weather30%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 20 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly AUS → SEA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 2,205 flights
- Middays85% on time · p90 20 min · 1,280 flights
- Afternoons83% on time · p90 25 min · 938 flights
- Evenings70% on time · p90 60 min · 1,721 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 84% on time.
- Wednesdays84% on time · p90 20 min · 882 flights
- Tuesdays84% on time · p90 25 min · 873 flights
- Fridays82% on time · p90 35 min · 900 flights
- Saturdays82% on time · p90 25 min · 785 flights
- Thursdays81% on time · p90 30 min · 900 flights
- Mondays79% on time · p90 35 min · 907 flights
- Sundays78% on time · p90 35 min · 897 flights
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