San Diego International in April 2024

79.4%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 April 2024, reporting carriers scheduled 7,585 domestic departures from San Diego International (SAN). 79.4% left less than 15 minutes late and 79.3% reached their destination on time; 0.5% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.2% arrived on time, so SAN departures were 1.1 points below the national departure figure.

Flights arriving at SAN that month were on time 78.7% of the time (7,584 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 38%, air carrier 31% and national aviation system 26%.

On time 79.3%
Arrived 15+ minutes late 20.0%
Cancelled 0.5%
Diverted 0.2%

Every scheduled departure from SAN in April 2024, judged by arrival at the destination.

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

Measure	Apr 2024	Year earlier	SAN, 12 months to Jul 2026	All reported flights, Apr 2024
Departed on time	79.4%	—	73.5%	80.5%
Arrived on time	79.3%	—	76.1%	80.2%
Cancelled	0.5%	—	1.3%	0.7%
Average departure delay (late minutes only)	14.6 min	—	16.6 min	14.2 min
Scheduled departures a day	253	—	275	19,406
Scheduled departures	7,585	—	100,196	582,185

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,772	37%	78.7%	4.3 min	0.4%
OO SkyWest Airlines	982	13%	76.4%	11.2 min	0.6%
UA United Airlines	874	12%	81.1%	2.2 min	0.5%
AS Alaska Airlines	800	11%	77.4%	6.3 min	0.4%
DL Delta Air Lines	770	10%	87.9%	-1.9 min	0.1%
AA American Airlines	737	10%	83.6%	11.0 min	0.8%
F9 Frontier Airlines	275	4%	56.7%	29.6 min	1.5%
NK Spirit Airlines	162	2%	83.3%	3.8 min	0.6%
B6 JetBlue Airways	146	2%	83.6%	-0.9 min	0.0%
HA Hawaiian Airlines	59	1%	76.3%	17.7 min	0.0%
G4 Allegiant Air	8	0%	87.5%	4.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SAN–SFO	San Diego to San Francisco	549	42.4%	37.9 min	1.8%
SAN–LAS	San Diego to Las Vegas	505	76.0%	11.1 min	0.4%
SAN–DEN	San Diego to Denver	465	80.4%	4.1 min	0.4%
SAN–PHX	San Diego to Phoenix	461	79.6%	12.2 min	0.4%
SAN–SMF	San Diego to Sacramento	448	81.5%	1.7 min	0.4%
SAN–SJC	San Diego to San Jose	432	84.7%	0.1 min	0.2%
SAN–SEA	San Diego to Seattle	367	83.9%	3.6 min	0.3%
SAN–DFW	San Diego to Dallas/Fort Worth	323	74.9%	19.7 min	1.9%
SAN–OAK	San Diego to Oakland	280	82.5%	1.9 min	0.7%
SAN–ORD	San Diego to Chicago	235	88.1%	-3.2 min	0.4%
SAN–SLC	San Diego to Salt Lake City	219	88.1%	-0.9 min	0.0%
SAN–JFK	San Diego to New York	195	83.1%	0.6 min	0.5%

By scheduled departure hour

100

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

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

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2024	Minutes
Air carrier	30.5%	33.6%	30,802
Late-arriving aircraft	38.4%	41.0%	38,787
National Aviation System	25.6%	20.0%	25,848
Extreme weather	5.1%	5.1%	5,174
Security	0.3%	0.2%	318

100,929 delay minutes on 1,519 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 April 2024?

79.4% of 7,585 scheduled domestic departures left less than 15 minutes late, and 79.3% reached their destination on time. The national figures that month were 80.5% and 80.2%.

How does that compare with a year earlier?

April 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 April 2024; 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.