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

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

82.6% of 1,247 official scheduled SEA-to-BLI flights arrived on time; 8.9% 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
82.6%arrived on time
8.9%30+ min late
2.2%cancelled
1,247scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.9%all scheduled flights
120+ minutes late1.0%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+1.4 mincompleted flights

Which departure time was most reliable for SEA to BLI?

Among qualifying SEA-to-BLI departure window results, Evening had the highest on-time rate: 88.9% of 171 flights. Late morning was lowest at 77.1% across 315 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning31577.1%13.0%2.9%
Afternoon35281.2%10.5%1.7%
Evening17188.9%5.8%1.8%
Night40985.3%5.6%2.4%

Which weekday was most reliable for SEA to BLI?

Among qualifying SEA-to-BLI weekday results, Monday had the highest on-time rate: 86.0% of 179 flights. Friday was lowest at 72.1% across 179 flights.

DayFlightsOn time30+ minCancelled
Monday17986.0%8.4%1.1%
Tuesday18384.7%7.1%1.6%
Wednesday17885.4%7.3%3.9%
Thursday17683.0%10.2%1.1%
Friday17972.1%13.4%2.8%
Saturday17884.8%6.7%3.4%
Sunday17482.2%9.2%1.7%

Which airline was most reliable for SEA to BLI?

Only SkyWest Airlines met the SEA-to-BLI airline threshold: 82.6% of 1,247 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines1,24782.6%8.9%2.2%

Which month was most reliable for SEA to BLI?

Among qualifying SEA-to-BLI month results, April 2026 had the highest on-time rate: 93.3% of 90 flights. December 2025 was lowest at 74.2% across 124 flights.

MonthFlightsOn time30+ minCancelled
July 202512480.6%8.9%0.8%
August 202512480.6%11.3%0.8%
September 202512085.0%5.8%0.0%
October 202511684.5%12.9%1.7%
November 20259776.3%5.2%10.3%
December 202512474.2%14.5%2.4%
January 20269878.6%8.2%6.1%
February 20268190.1%3.7%2.5%
March 20269083.3%12.2%2.2%
April 20269093.3%4.4%0.0%
May 20269388.2%7.5%0.0%
June 20269081.1%8.9%1.1%

What drove SEA to BLI delay minutes?

Late aircraft was the largest recorded SEA-to-BLI delay category, accounting for 49.8% of 9,627 BTS-attributed delay minutes during July 2025–June 2026.

Airline28.8%
Late aircraft49.8%
National airspace16.7%
Weather4.7%
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.