OnTimeStats

Historical on-time performance

Bellingham to Seattle

93 miData through May 2026Source: US DOT · BTS

Flights on BLI–SEA arrive on time 81% of the time over the last 12 months.

On-time rate81%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled2.1%of scheduled flights

based on 1,277 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time81%
    Medianon time
    p9025 min
    Cancel2.1%
    Flights1,277

Why flights run late

Delay causes

  • Airline32%
  • Weather9%
  • Air traffic (NAS)14%
  • Late aircraft45%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline7%
  • Weather52%
  • Air traffic (NAS)41%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 27 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 BLI → 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 74% to 83% on time.

  • Mornings83% on time · p90 20 min · 1,429 flights
  • Evenings80% on time · p90 35 min · 414 flights
  • Middays75% on time · p90 35 min · 916 flights
  • Afternoons74% on time · p90 45 min · 445 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 76% to 82% on time.

  • Saturdays82% on time · p90 30 min · 413 flights
  • Wednesdays81% on time · p90 25 min · 462 flights
  • Sundays80% on time · p90 25 min · 461 flights
  • Tuesdays79% on time · p90 25 min · 461 flights
  • Mondays79% on time · p90 25 min · 470 flights
  • Fridays77% on time · p90 35 min · 470 flights
  • Thursdays76% on time · p90 40 min · 467 flights

Keep exploring

Related pages

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.