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

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

82.6% of 7,428 official scheduled SEA-to-LAX flights arrived on time; 9.5% arrived at least 30 minutes late and 0.9% 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
82.6%arrived on time
9.5%30+ min late
0.9%cancelled
7,428scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.3%all scheduled flights
120+ minutes late1.9%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+1.2 mincompleted flights

Which departure time was most reliable for SEA to LAX?

Among qualifying SEA-to-LAX departure window results, Early morning had the highest on-time rate: 88.6% of 1,787 flights. Night was lowest at 71.7% across 318 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,78788.6%6.0%0.7%
Late morning1,23481.8%8.9%1.3%
Afternoon1,86484.2%8.0%1.1%
Evening2,22578.3%12.6%0.8%
Night31871.7%17.0%0.3%

Which weekday was most reliable for SEA to LAX?

Among qualifying SEA-to-LAX weekday results, Tuesday had the highest on-time rate: 85.8% of 1,028 flights. Sunday was lowest at 79.4% across 1,093 flights.

DayFlightsOn time30+ minCancelled
Monday1,13582.2%9.1%1.2%
Tuesday1,02885.8%7.3%0.4%
Wednesday98585.5%9.1%0.4%
Thursday1,11880.5%10.1%0.9%
Friday1,11580.5%10.1%1.6%
Saturday95485.0%8.7%0.4%
Sunday1,09379.4%11.4%1.3%

Which airline was most reliable for SEA to LAX?

Among qualifying SEA-to-LAX airline results, United Airlines had the highest on-time rate: 90.3% of 393 flights. Frontier Airlines was lowest at 76.1% across 276 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines3,28280.2%9.9%1.1%
Delta Air Lines2,22583.9%9.0%0.7%
SkyWest Airlines1,24185.6%8.9%0.6%
United Airlines39390.3%6.6%0.0%
Frontier Airlines27676.1%13.8%3.6%
American Airlines1190.9%9.1%0.0%

Which month was most reliable for SEA to LAX?

Among qualifying SEA-to-LAX month results, April 2026 had the highest on-time rate: 89.0% of 611 flights. December 2025 was lowest at 72.5% across 632 flights.

MonthFlightsOn time30+ minCancelled
July 202564276.8%14.2%1.2%
August 202563579.8%12.1%0.5%
September 202560588.4%6.0%0.3%
October 202561485.0%7.2%1.3%
November 202560483.3%7.1%1.5%
December 202563272.5%15.8%1.7%
January 202656480.9%10.3%0.7%
February 202655482.5%8.7%0.2%
March 202663981.5%8.6%2.3%
April 202661189.0%6.2%0.5%
May 202667786.7%7.5%0.1%
June 202665184.6%9.4%0.5%

What drove SEA to LAX delay minutes?

Airline was the largest recorded SEA-to-LAX delay category, accounting for 51.5% of 72,456 BTS-attributed delay minutes during July 2025–June 2026.

Airline51.5%
Late aircraft32.0%
National airspace13.6%
Weather2.9%
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.