Historical on-time performance

SFOLAX

San Francisco to Los Angeles

337 miData through Dec 2025Source: US DOT · BTS

Flights on SFO–LAX arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min

Median delayon timetypical arrival

p90 delay40 min1 in 10 flights is worsetail risk

Cancelled0.4%of scheduled flights

based on 10,644 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
Frontier Airlines	68%	on time	70 min	1.1%	353
SkyWest Airlines	78%	on time	40 min	0.7%	2,684
Delta Air Lines	79%	on time	45 min	0.4%	2,361
United Airlines	82%	on time	30 min	0.2%	3,347
Alaska Airlinesbest⚠ low data	86%	on time	20 min	1.5%	65
American Airlines	82%	on time	40 min	0.2%	494
Southwest Airlines	69%	on time	55 min	0.4%	1,340

Frontier Airlines
On-time68%
Medianon time
p9070 min
Cancel1.1%
Flights353
SkyWest Airlines
On-time78%
Medianon time
p9040 min
Cancel0.7%
Flights2,684
Delta Air Lines
On-time79%
Medianon time
p9045 min
Cancel0.4%
Flights2,361
United Airlines
On-time82%
Medianon time
p9030 min
Cancel0.2%
Flights3,347
Alaska Airlinesbest
On-time86%
Medianon time
p9020 min
Cancel1.5%
Flights65
American Airlines
On-time82%
Medianon time
p9040 min
Cancel0.2%
Flights494
Southwest Airlines
On-time69%
Medianon time
p9055 min
Cancel0.4%
Flights1,340

Why flights run late

Delay causes

Airline29%
Weather1%
Air traffic (NAS)15%
Late aircraft55%
Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Related pages

Delay predictorfor this route→SFO airportSan Francisco→LAX airportLos Angeles→Horizon Air on this routecarrier detail→Horizon Airairline profile→