San Diego International in August 2023

76.3%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 August 2023, reporting carriers scheduled 8,058 domestic departures from San Diego International (SAN). 76.3% left less than 15 minutes late and 76.1% reached their destination on time; 2.9% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so SAN departures were level with the national departure figure.

Flights arriving at SAN that month were on time 73.6% of the time (8,057 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 31% and national aviation system 17%.

On time 76.1%
Arrived 15+ minutes late 20.8%
Cancelled 2.9%
Diverted 0.3%

Every scheduled departure from SAN in August 2023, judged by arrival at the destination.

August 2023 against a year earlier, the airport's year and the nation

Measure	Aug 2023	Year earlier	SAN, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	76.3%	—	73.5%	76.7%
Arrived on time	76.1%	—	76.1%	76.9%
Cancelled	2.9%	—	1.3%	1.5%
Average departure delay (late minutes only)	15.9 min	—	16.6 min	17.3 min
Scheduled departures a day	269	—	275	20,100
Scheduled departures	8,058	—	100,196	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	3,093	38%	72.9%	6.5 min	4.8%
UA United Airlines	971	12%	83.7%	-0.1 min	1.4%
OO SkyWest Airlines	861	11%	77.5%	8.3 min	0.3%
DL Delta Air Lines	843	10%	81.6%	5.3 min	1.5%
AS Alaska Airlines	811	10%	79.9%	4.8 min	0.5%
AA American Airlines	789	10%	76.4%	14.8 min	1.0%
F9 Frontier Airlines	258	3%	56.6%	39.0 min	11.6%
NK Spirit Airlines	167	2%	76.0%	8.0 min	3.0%
B6 JetBlue Airways	154	2%	66.9%	23.4 min	0.6%
HA Hawaiian Airlines	62	1%	72.6%	5.9 min	3.2%
G4 Allegiant Air	49	1%	73.5%	10.9 min	2.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SAN–SFO	San Diego to San Francisco	570	74.7%	6.8 min	1.6%
SAN–LAS	San Diego to Las Vegas	559	73.3%	9.5 min	6.8%
SAN–SJC	San Diego to San Jose	484	75.0%	9.8 min	3.7%
SAN–DEN	San Diego to Denver	482	75.3%	4.6 min	4.1%
SAN–SMF	San Diego to Sacramento	459	74.5%	5.7 min	4.6%
SAN–PHX	San Diego to Phoenix	455	74.3%	11.8 min	4.4%
SAN–SEA	San Diego to Seattle	430	81.2%	5.3 min	1.2%
SAN–OAK	San Diego to Oakland	358	69.8%	8.1 min	5.3%
SAN–DFW	San Diego to Dallas/Fort Worth	314	70.1%	23.2 min	1.9%
SAN–ORD	San Diego to Chicago	235	87.2%	-5.4 min	1.7%
SAN–ATL	San Diego to Atlanta	219	74.9%	14.3 min	4.6%
SAN–JFK	San Diego to New York	203	80.3%	2.7 min	1.0%

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), August 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	30.5%	36.7%	34,920
Late-arriving aircraft	48.4%	42.2%	55,374
National Aviation System	17.1%	15.7%	19,577
Extreme weather	3.8%	5.1%	4,397
Security	0.1%	0.2%	101

114,369 delay minutes on 1,673 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 SAN on time in August 2023?

76.3% of 8,058 scheduled domestic departures left less than 15 minutes late, and 76.1% reached their destination on time. The national figures that month were 76.7% and 76.9%.

How does that compare with a year earlier?

August 2022 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 August 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SAN · methodology · corrections.