BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BLI→SEA

Bellingham, WA (BLI) to Seattle, WA (SEA) flight delay odds

82.1% of 1,248 official scheduled BLI-to-SEA flights arrived on time; 9.1% arrived at least 30 minutes late and 2.2% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
82.1%arrived on time
9.1%30+ min late
2.2%cancelled
1,248scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.5%all scheduled flights
120+ minutes late1.2%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+2.0 mincompleted flights

Which departure time was most reliable for BLI to SEA?

Among qualifying BLI-to-SEA departure window results, Early morning had the highest on-time rate: 90.6% of 509 flights. Late morning was lowest at 74.1% across 85 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning50990.6%3.5%1.8%
Late morning8574.1%11.8%3.5%
Afternoon53475.3%13.3%2.6%
Evening12081.7%11.7%0.8%

Which weekday was most reliable for BLI to SEA?

Among qualifying BLI-to-SEA weekday results, Saturday had the highest on-time rate: 86.0% of 179 flights. Friday was lowest at 73.6% across 178 flights.

DayFlightsOn time30+ minCancelled
Monday17981.6%8.4%1.7%
Tuesday18385.8%6.6%1.6%
Wednesday17984.9%5.6%2.2%
Thursday17780.8%10.2%2.3%
Friday17873.6%15.2%2.2%
Saturday17986.0%7.3%3.4%
Sunday17381.5%10.4%1.7%

Which airline was most reliable for BLI to SEA?

Only SkyWest Airlines met the BLI-to-SEA airline threshold: 82.1% of 1,248 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines1,24882.1%9.1%2.2%

Which month was most reliable for BLI to SEA?

Among qualifying BLI-to-SEA month results, April 2026 had the highest on-time rate: 91.1% of 90 flights. December 2025 was lowest at 72.6% across 124 flights.

MonthFlightsOn time30+ minCancelled
July 202512483.9%8.1%0.8%
August 202512485.5%9.7%0.8%
September 202512083.3%9.2%0.0%
October 202511780.3%16.2%1.7%
November 20259681.2%5.2%10.4%
December 202512472.6%12.9%1.6%
January 20269878.6%7.1%7.1%
February 20268286.6%6.1%2.4%
March 20269078.9%7.8%2.2%
April 20269091.1%4.4%0.0%
May 20269383.9%8.6%0.0%
June 20269081.1%10.0%0.0%

What drove BLI to SEA delay minutes?

Late aircraft was the largest recorded BLI-to-SEA delay category, accounting for 41.5% of 10,591 BTS-attributed delay minutes during July 2025–June 2026.

Airline35.0%
Late aircraft41.5%
National airspace14.5%
Weather9.1%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.