Historical on-time performance
Anchorage to Seattle
1,449 miData through May 2026Source: US DOT · BTS
Flights on ANC–SEA arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 6,704 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time89%Medianon timep9015 minCancel0.7%Flights1,642
- Alaska AirlinesOn-time84%Medianon timep9020 minCancel1.2%Flights4,911
- Hawaiian AirlinesOn-time30%Median20 minp90130 minCancel2.0%Flights151
Why flights run late
Delay causes
- Airline43%
- Weather7%
- Air traffic (NAS)14%
- Late aircraft36%
- Security1%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline73%
- Weather21%
- Air traffic (NAS)7%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 73 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 ANC → SEA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 76% to 88% on time.
- Mornings88% on time · p90 15 min · 6,327 flights
- Overnights87% on time · p90 15 min · 151 flights · limited
- Middays87% on time · p90 15 min · 3,922 flights
- Early mornings83% on time · p90 25 min · 5,449 flights
- Afternoons81% on time · p90 25 min · 3,573 flights
- Evenings76% on time · p90 35 min · 2,295 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 82% to 86% on time.
- Wednesdays86% on time · p90 20 min · 2,966 flights
- Tuesdays85% on time · p90 20 min · 3,048 flights
- Fridays85% on time · p90 20 min · 3,267 flights
- Thursdays84% on time · p90 20 min · 3,176 flights
- Sundays84% on time · p90 25 min · 3,190 flights
- Mondays84% on time · p90 25 min · 3,194 flights
- Saturdays82% on time · p90 25 min · 2,876 flights
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