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

Los Angeles, CA (LAX) to Seattle, WA (SEA) flight delay odds

84.4% of 7,424 official scheduled LAX-to-SEA flights arrived on time; 8.8% arrived at least 30 minutes late and 1.0% 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 SIGNALLower disruption
84.4%arrived on time
8.8%30+ min late
1.0%cancelled
7,424scheduled 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 late1.8%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival-2.5 mincompleted flights

Which departure time was most reliable for LAX to SEA?

Among qualifying LAX-to-SEA departure window results, Early morning had the highest on-time rate: 88.4% of 1,317 flights. Night was lowest at 81.7% across 246 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,31788.4%5.0%1.2%
Late morning1,50686.3%8.4%1.1%
Afternoon2,00983.2%9.5%1.1%
Evening2,34682.3%10.4%0.6%
Night24681.7%9.8%1.6%

Which weekday was most reliable for LAX to SEA?

Among qualifying LAX-to-SEA weekday results, Tuesday had the highest on-time rate: 88.3% of 1,013 flights. Friday was lowest at 79.5% across 1,096 flights.

DayFlightsOn time30+ minCancelled
Monday1,13485.6%7.9%1.2%
Tuesday1,01388.3%7.0%0.4%
Wednesday1,00286.5%7.1%0.4%
Thursday1,11982.9%9.8%0.8%
Friday1,09679.5%11.8%1.6%
Saturday94586.5%7.9%0.8%
Sunday1,11582.4%9.3%1.4%

Which airline was most reliable for LAX to SEA?

Among qualifying LAX-to-SEA airline results, Delta Air Lines had the highest on-time rate: 86.0% of 2,224 flights. Frontier Airlines was lowest at 76.8% across 276 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines3,27984.2%7.7%1.1%
Delta Air Lines2,22486.0%8.9%0.8%
SkyWest Airlines1,23983.9%10.3%0.6%
United Airlines39584.6%9.1%0.5%
Frontier Airlines27676.8%12.3%3.6%
American Airlines1181.8%18.2%0.0%

Which month was most reliable for LAX to SEA?

Among qualifying LAX-to-SEA month results, September 2025 had the highest on-time rate: 92.1% of 606 flights. June 2026 was lowest at 78.2% across 651 flights.

MonthFlightsOn time30+ minCancelled
July 202564279.1%12.0%1.6%
August 202563380.4%11.7%0.6%
September 202560692.1%3.3%0.5%
October 202561287.6%6.7%1.0%
November 202560489.4%5.5%1.2%
December 202562980.3%11.0%1.4%
January 202656285.1%9.1%1.1%
February 202655586.8%7.6%0.4%
March 202663882.9%10.0%2.4%
April 202661386.9%6.2%0.8%
May 202667985.4%8.0%0.4%
June 202665178.2%13.4%0.5%

What drove LAX to SEA delay minutes?

Airline was the largest recorded LAX-to-SEA delay category, accounting for 51.8% of 68,457 BTS-attributed delay minutes during July 2025–June 2026.

Airline51.8%
Late aircraft33.2%
National airspace13.5%
Weather1.3%
Security0.2%
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.