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Route Reliability

Bellingham → Seattle

BLI–SEA · 93 miles · Bellingham International Airport to Seattle–Tacoma International Airport

83
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
2 min
Average arrival delay
2.1%
Cancelled
1,305
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 84% of the time across 1,305 flights. No comparison to make.

What the data says

Morning-you made the right choice.

BLI–SEA flights departing between 3–6 AM arrived on time 93% of the time, versus 75% between 3–6 PM.

Friday is doing you no favors.

BLI–SEA flights arrived on time 87% of the time on Saturdays. On Fridays: 75%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon85%(185 flights)
  • Tue85%(185 flights)
  • Wed87%(181 flights)
  • Thu83%(181 flights)
  • Fri75%(182 flights)
  • Sat87%(179 flights)
  • Sun83%(183 flights)
On-time by departure window
  • 3–6 AM93%(256 flights)
  • 6–9 AM91%(275 flights)
  • 9 AM–12 PM78%(107 flights)
  • 12–3 PM77%(322 flights)
  • 3–6 PM75%(260 flights)
  • 6–9 PM89%(56 flights)
On-time trend by month
85%
May

Jun 72% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%119
July 202585%123
August 202586%123
September 202583%120
October 202582%122
November 202591%106
December 202577%121
January 202685%91
February 202689%80
March 202681%88
April 202691%90
May 202685%93

Keep nerding

Based on 1,305 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.