Historical on-time performance
Seattle to Bellingham
93 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–BLI arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.9%of scheduled flights
based on 1,360 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time78%Medianon timep9030 minCancel1.9%Flights1,360
Why flights run late
Delay causes
- Airline20%
- Weather5%
- Air traffic (NAS)18%
- Late aircraft57%
- Security0%
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 SEA → BLI
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 79% to 84% on time.
- Overnights84% on time · p90 20 min · 1,260 flights
- Evenings83% on time · p90 30 min · 202 flights
- Middays80% on time · p90 30 min · 1,040 flights
- Afternoons79% on time · p90 35 min · 425 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 85% on time.
- Tuesdays85% on time · p90 15 min · 420 flights
- Saturdays85% on time · p90 20 min · 371 flights
- Wednesdays85% on time · p90 15 min · 421 flights
- Thursdays83% on time · p90 30 min · 424 flights
- Fridays79% on time · p90 30 min · 429 flights
- Mondays78% on time · p90 30 min · 435 flights
- Sundays78% on time · p90 35 min · 427 flights
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