Historical on-time performance

SEALAX

Seattle to Los Angeles

954 miData through Dec 2025Source: US DOT · BTS

Flights on SEA–LAX arrive on time 83% of the time over the last 12 months.

On-time rate83%arrived within 15 min

Median delayon timetypical arrival

p90 delay25 min1 in 10 flights is worsetail risk

Cancelled0.8%of scheduled flights

based on 7,074 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	88%	on time	15 min	0.4%	2,193
Frontier Airlines⚠ low data	84%	on time	25 min	3.2%	31
SkyWest Airlines	83%	on time	30 min	0.7%	909
United Airlines	91%	on time	10 min	0.2%	605
Alaska Airlines	77%	on time	30 min	1.2%	3,306
Spirit Airlinesbest⚠ low data	93%	on time	on time	0.0%	30

Delta Air Lines
On-time88%
Medianon time
p9015 min
Cancel0.4%
Flights2,193
Frontier Airlines
On-time84%
Medianon time
p9025 min
Cancel3.2%
Flights31
SkyWest Airlines
On-time83%
Medianon time
p9030 min
Cancel0.7%
Flights909
United Airlines
On-time91%
Medianon time
p9010 min
Cancel0.2%
Flights605
Alaska Airlines
On-time77%
Medianon time
p9030 min
Cancel1.2%
Flights3,306
Spirit Airlinesbest
On-time93%
Medianon time
p90on time
Cancel0.0%
Flights30

Why flights run late

Delay causes

Airline53%
Weather2%
Air traffic (NAS)14%
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→SEA airportSeattle→LAX airportLos Angeles→Horizon Air on this routecarrier detail→Horizon Airairline profile→