Historical on-time performance

LAXSEA

Los Angeles to Seattle

954 miData through Dec 2025Source: US DOT · BTS

Flights on LAX–SEA arrive on time 84% of the time over the last 12 months.

On-time rate84%arrived within 15 min

Median delayon timetypical arrival

p90 delay25 min1 in 10 flights is worsetail risk

Cancelled0.9%of scheduled flights

based on 7,076 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Airline	On-time	Median	p90	Cancel	Flights
Delta Air Lines	89%	on time	15 min	0.4%	2,191
SkyWest Airlines	80%	on time	45 min	0.7%	907
United Airlines	86%	on time	20 min	0.5%	606
Spirit Airlinesbest⚠ low data	97%	on time	on time	0.0%	30
Alaska Airlines	82%	on time	25 min	1.4%	3,311
Frontier Airlines⚠ low data	71%	on time	50 min	6.5%	31

Delta Air Lines
On-time89%
Medianon time
p9015 min
Cancel0.4%
Flights2,191
SkyWest Airlines
On-time80%
Medianon time
p9045 min
Cancel0.7%
Flights907
United Airlines
On-time86%
Medianon time
p9020 min
Cancel0.5%
Flights606
Spirit Airlinesbest
On-time97%
Medianon time
p90on time
Cancel0.0%
Flights30
Alaska Airlines
On-time82%
Medianon time
p9025 min
Cancel1.4%
Flights3,311
Frontier Airlines
On-time71%
Medianon time
p9050 min
Cancel6.5%
Flights31

Why flights run late

Delay causes

Airline51%
Weather2%
Air traffic (NAS)17%
Late aircraft30%
Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

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Related pages

Delay predictorfor this route→LAX airportLos Angeles→SEA airportSeattle→Delta Air Lines on this routecarrier detail→Delta Air Linesairline profile→