Historical on-time performance
Austin to Seattle
1,770 miData through Dec 2025Source: US DOT · BTS
Flights on AUS–SEA arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 2,017 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 timep9035 minCancel0.7%Flights867
- Alaska AirlinesOn-time78%Medianon timep9035 minCancel0.7%Flights1,150
Why flights run late
Delay causes
- Airline37%
- Weather5%
- Air traffic (NAS)16%
- Late aircraft41%
- Security1%
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 AUS → SEA
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 — 88% on time.
- Mornings88% on time · p90 15 min · 2,248 flights
- Middays85% on time · p90 20 min · 1,194 flights
- Afternoons84% on time · p90 25 min · 990 flights
- Evenings70% on time · p90 55 min · 1,660 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 84% on time.
- Wednesdays84% on time · p90 20 min · 880 flights
- Tuesdays84% on time · p90 25 min · 871 flights
- Saturdays83% on time · p90 25 min · 785 flights
- Fridays82% on time · p90 35 min · 888 flights
- Thursdays81% on time · p90 30 min · 885 flights
- Sundays79% on time · p90 30 min · 883 flights
- Mondays79% on time · p90 35 min · 900 flights
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