LAX → SFO: 67% on-time · OnTimeStats

Historical on-time performance

Los Angeles to San Francisco

337 miData through May 2026Source: US DOT · BTS

Flights on LAX–SFO arrive on time 67% of the time over the last 12 months.

On-time rate67%arrived within 15 min

p90 delay60 min1 in 10 flights is worse (tail risk)

Cancelled0.8%of scheduled flights

based on 10,516 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
SkyWest Airlinesbest	74%	on time	50 min	1.1%	2,614
United Airlines	69%	on time	55 min	0.2%	3,250
Delta Air Lines	67%	on time	55 min	1.5%	2,375
Southwest Airlines	62%	on time	70 min	0.3%	1,325
American Airlines	62%	on time	80 min	0.5%	202
Alaska Airlines	52%	10 min	70 min	0.4%	471
Frontier Airlines	48%	15 min	100 min	1.8%	279

SkyWest Airlinesbest
On-time74%
Medianon time
p9050 min
Cancel1.1%
Flights2,614
United Airlines
On-time69%
Medianon time
p9055 min
Cancel0.2%
Flights3,250
Delta Air Lines
On-time67%
Medianon time
p9055 min
Cancel1.5%
Flights2,375
Southwest Airlines
On-time62%
Medianon time
p9070 min
Cancel0.3%
Flights1,325
American Airlines
On-time62%
Medianon time
p9080 min
Cancel0.5%
Flights202
Alaska Airlines
On-time52%
Median10 min
p9070 min
Cancel0.4%
Flights471
Frontier Airlines
On-time48%
Median15 min
p90100 min
Cancel1.8%
Flights279

Why flights run late

Delay causes

Airline22%
Weather1%
Air traffic (NAS)51%
Late aircraft25%
Security0%

Most delay minutes here are attributed to Air traffic (NAS).

When flights don't go

Why flights were cancelled

Airline55%
Weather24%
Air traffic (NAS)21%
Security0%

Most cancellations here are attributed to Airline. Shares are among 84 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly LAX → SFO

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

Mornings are the most reliable time of day to fly this route — 75% on time.

Mornings75% on time · p90 40 min · 8,750 flights
Afternoons71% on time · p90 55 min · 4,639 flights
Middays71% on time · p90 50 min · 8,017 flights
Overnights67% on time · p90 60 min · 5,069 flights
Evenings66% on time · p90 70 min · 7,133 flights

Best day of week

Tuesdays are the most reliable day to fly this route — 77% on time.

Tuesdays77% on time · p90 35 min · 4,586 flights
Saturdays75% on time · p90 40 min · 4,282 flights
Wednesdays72% on time · p90 50 min · 4,592 flights
Thursdays69% on time · p90 60 min · 5,076 flights
Mondays68% on time · p90 55 min · 5,082 flights
Fridays67% on time · p90 65 min · 5,049 flights
Sundays66% on time · p90 65 min · 4,941 flights

Keep exploring

Related pages

Delay predictorfor this route→LAX airportLos Angeles→SFO airportSan Francisco→United Airlinesairline profile→SkyWest Airlinesairline profile→Delta Air Linesairline profile→Seasonal delay patternsguide→