FlightRecord

Bellingham (BLI) to Seattle (SEA): On-Time Performance

Data through May 2026

When you fly BLI to SEA matters as much as anything else about the booking: the route swung from 91% on-time in April 2026 to just 54% in September 2024. Across the full period the route averages 80% on-time against a national 78%.

On-time
80%
arrived <15 min late
Avg delay
13 min
completed flights
Cancelled
1.7%
Flights/day
3.5
last 12 months
Duration
54m
scheduled
Distance
93 mi

Monthly on-time trend

Monthly on-time percentage for BLI to SEA flights50%75%100%June 2024: 75% on-time (85 flights)75Jun 2024July 2024: 83% on-time (88 flights)83August 2024: 68% on-time (88 flights)68September 2024: 54% on-time (85 flights)54Sep 2024October 2024: 80% on-time (88 flights)80November 2024: 83% on-time (83 flights)83December 2024: 83% on-time (82 flights)83Dec 2024January 2025: 74% on-time (113 flights)74February 2025: 67% on-time (104 flights)67March 2025: 80% on-time (104 flights)80Mar 2025April 2025: 81% on-time (95 flights)81May 2025: 85% on-time (119 flights)85June 2025: 72% on-time (119 flights)72Jun 2025July 2025: 85% on-time (124 flights)85August 2025: 86% on-time (124 flights)86September 2025: 83% on-time (120 flights)83Sep 2025October 2025: 82% on-time (117 flights)82November 2025: 91% on-time (96 flights)91December 2025: 74% on-time (124 flights)74Dec 2025January 2026: 85% on-time (98 flights)85February 2026: 89% on-time (82 flights)89March 2026: 81% on-time (90 flights)81Mar 2026April 2026: 91% on-time (90 flights)91May 2026: 84% on-time (93 flights)84

Best time to fly from BLI to SEA

Aim for departures around 6 a.m. (95% on-time); avoid 12 p.m. departures (71%).

On-time percentage by scheduled departure hour, BLI to SEA5 a.m.: 85% on-time (588 flights)56 a.m.: 95% on-time (139 flights)68 a.m.: 83% on-time (286 flights)89 a.m.: 76% on-time (51 flights)911 a.m.: 84% on-time (45 flights)1112 p.m.: 71% on-time (246 flights)121 p.m.: 76% on-time (311 flights)132 p.m.: 74% on-time (147 flights)143 p.m.: 72% on-time (54 flights)154 p.m.: 73% on-time (192 flights)165 p.m.: 71% on-time (64 flights)176 p.m.: 80% on-time (267 flights)187 p.m.: 95% on-time (21 flights)19scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday78%12 min
Tuesday81%10 min
Wednesday81%15 min
Thursday78%11 min
Friday77%17 min
Saturdaybest83%12 min
Sunday80%11 min

What causes delays on this route

Share of total delay minutes by cause, as reported by carriers to the US DOT.

  • Late-arriving aircraft38%
  • Airline operations37%
  • National airspace system16%
  • Weather9%

Frequently asked questions

How often are flights from BLI to SEA delayed?
20% of BLI–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
What is the best time of day to fly from BLI to SEA?
Departures around 6 a.m. have the best record (95% on-time), while departures around 12 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from BLI to SEA?
The scheduled BLI–SEA flight time averages 54m over 93 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
How often are BLI to SEA flights cancelled?
1.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
What is the worst month to fly from BLI to SEA?
September 2024 was the roughest month in this dataset, with only 54% of arrivals on time. The best was April 2026 at 91%. If your dates are flexible, that 37-point gap is worth planning around.

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Based on 2,411 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.