Historical on-time performance
Seattle to Juneau
909 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–JNU arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights
based on 1,531 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.
- Delta Air LinesOn-time79%Medianon timep9045 minCancel0.0%Flights92
- Alaska AirlinesOn-time72%Medianon timep9035 minCancel1.5%Flights1,439
Why flights run late
Delay causes
- Airline40%
- Weather4%
- Air traffic (NAS)22%
- Late aircraft33%
- 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 → JNU
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 71% to 78% on time.
- Mornings78% on time · p90 25 min · 1,326 flights
- Afternoons77% on time · p90 30 min · 141 flights · limited
- Middays74% on time · p90 40 min · 1,019 flights
- Evenings73% on time · p90 40 min · 1,164 flights
- Overnights71% on time · p90 40 min · 1,175 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 81% on time.
- Tuesdays81% on time · p90 25 min · 683 flights
- Saturdays78% on time · p90 25 min · 703 flights
- Wednesdays75% on time · p90 35 min · 679 flights
- Fridays72% on time · p90 40 min · 689 flights
- Sundays72% on time · p90 40 min · 705 flights
- Mondays71% on time · p90 40 min · 685 flights
- Thursdays70% on time · p90 40 min · 681 flights
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