San Francisco International in July 2024

74.6%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In July 2024, reporting carriers scheduled 11,828 domestic departures from San Francisco International (SFO). 74.6% left less than 15 minutes late and 74.9% reached their destination on time; 2.4% were cancelled.

Nationally that month, 68.5% of flights departed on time and 68.1% arrived on time, so SFO departures were 6.1 points above the national departure figure.

Flights arriving at SFO that month were on time 73.2% of the time (11,828 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 40% and national aviation system 16%.

On time 74.9%
Arrived 15+ minutes late 22.4%
Cancelled 2.4%
Diverted 0.3%

Every scheduled departure from SFO in July 2024, judged by arrival at the destination.

July 2024 against a year earlier, the airport's year and the nation

Measure	Jul 2024	Year earlier	SFO, 12 months to Jul 2026	All reported flights, Jul 2024
Departed on time	74.6%	—	75.1%	68.5%
Arrived on time	74.9%	—	75.6%	68.1%
Cancelled	2.4%	—	1.0%	2.9%
Average departure delay (late minutes only)	18.7 min	—	17.8 min	24.9 min
Scheduled departures a day	394	—	404	21,154
Scheduled departures	11,828	—	147,566	634,613

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	4,424	37%	75.7%	7.6 min	3.1%
OO SkyWest Airlines	2,432	21%	80.4%	7.3 min	0.5%
AS Alaska Airlines	1,283	11%	71.0%	8.3 min	1.2%
DL Delta Air Lines	1,227	10%	72.5%	13.5 min	6.3%
AA American Airlines	968	8%	71.4%	25.0 min	1.5%
WN Southwest Airlines	639	5%	75.7%	8.7 min	0.0%
F9 Frontier Airlines	437	4%	54.7%	23.0 min	6.2%
B6 JetBlue Airways	356	3%	79.2%	3.8 min	0.0%
HA Hawaiian Airlines	62	1%	88.7%	-2.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SFO–LAX	San Francisco to Los Angeles	942	77.7%	5.2 min	3.0%
SFO–SEA	San Francisco to Seattle	624	69.9%	9.8 min	2.4%
SFO–JFK	San Francisco to New York	600	72.7%	10.8 min	1.7%
SFO–SAN	San Francisco to San Diego	539	68.8%	12.8 min	2.0%
SFO–ORD	San Francisco to Chicago	505	65.5%	14.5 min	2.6%
SFO–DEN	San Francisco to Denver	477	76.3%	10.3 min	0.6%
SFO–LAS	San Francisco to Las Vegas	445	65.8%	15.4 min	2.9%
SFO–BOS	San Francisco to Boston	443	75.4%	3.8 min	3.2%
SFO–DFW	San Francisco to Dallas/Fort Worth	387	70.3%	13.3 min	2.1%
SFO–PHX	San Francisco to Phoenix	364	75.8%	23.0 min	1.4%
SFO–PDX	San Francisco to Portland	351	72.1%	10.2 min	2.6%
SFO–SNA	San Francisco to Santa Ana	349	80.5%	6.5 min	0.9%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), July 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2024	Minutes
Air carrier	39.5%	36.6%	76,630
Late-arriving aircraft	43.0%	42.7%	83,495
National Aviation System	15.6%	16.0%	30,319
Extreme weather	1.8%	4.6%	3,558
Security	0.1%	0.1%	138

194,140 delay minutes on 2,652 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left SFO on time in July 2024?

74.6% of 11,828 scheduled domestic departures left less than 15 minutes late, and 74.9% reached their destination on time. The national figures that month were 68.5% and 68.1%.

How does that compare with a year earlier?

July 2023 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for July 2024; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SFO · methodology · corrections.