San Diego International in April 2025

79.5%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 2025, reporting carriers scheduled 7,959 domestic departures from San Diego International (SAN). 79.5% left less than 15 minutes late and 80.0% reached their destination on time; 0.6% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so SAN departures were 1.1 points below the national departure figure.

A year earlier, in April 2024, the airport had 7,585 departures with 79.4% leaving on time: a change of +0.1 points, with flights up 5%.

Flights arriving at SAN that month were on time 76.8% of the time (7,959 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 23% and national aviation system 22%.

On time 80.0%
Arrived 15+ minutes late 19.3%
Cancelled 0.6%
Diverted 0.1%

Every scheduled departure from SAN in April 2025, judged by arrival at the destination.

April 2025 against a year earlier, the airport's year and the nation

Measure	Apr 2025	Apr 2024	SAN, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	79.5%	79.4%	73.5%	80.6%
Arrived on time	80.0%	79.3%	76.1%	79.5%
Cancelled	0.6%	0.5%	1.3%	0.8%
Average departure delay (late minutes only)	13.0 min	14.6 min	16.6 min	14.1 min
Scheduled departures a day	265	253	275	19,465
Scheduled departures	7,959	7,585	100,196	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,924	37%	76.7%	6.6 min	0.5%
OO SkyWest Airlines	1,229	15%	75.6%	8.0 min	0.7%
AS Alaska Airlines	873	11%	81.6%	-0.7 min	0.3%
UA United Airlines	844	11%	83.4%	-0.3 min	0.4%
AA American Airlines	821	10%	83.7%	2.3 min	1.3%
DL Delta Air Lines	784	10%	89.2%	-3.2 min	0.3%
F9 Frontier Airlines	167	2%	68.9%	10.4 min	0.0%
NK Spirit Airlines	132	2%	87.9%	-2.2 min	0.0%
B6 JetBlue Airways	117	1%	93.2%	-14.0 min	0.9%
HA Hawaiian Airlines	60	1%	75.0%	9.4 min	0.0%
G4 Allegiant Air	8	0%	62.5%	29.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SAN–LAS	San Diego to Las Vegas	611	76.6%	7.7 min	0.7%
SAN–SFO	San Diego to San Francisco	527	78.0%	3.7 min	0.0%
SAN–SJC	San Diego to San Jose	468	76.3%	5.4 min	0.2%
SAN–PHX	San Diego to Phoenix	452	77.0%	8.4 min	0.7%
SAN–DEN	San Diego to Denver	435	74.0%	9.1 min	0.2%
SAN–SMF	San Diego to Sacramento	430	77.7%	5.2 min	0.9%
SAN–SEA	San Diego to Seattle	366	84.2%	2.5 min	0.5%
SAN–DFW	San Diego to Dallas/Fort Worth	290	79.0%	11.6 min	3.1%
SAN–OAK	San Diego to Oakland	289	77.5%	5.1 min	1.0%
SAN–ORD	San Diego to Chicago	263	91.6%	-10.3 min	1.1%
SAN–SLC	San Diego to Salt Lake City	229	86.5%	1.4 min	0.0%
SAN–JFK	San Diego to New York	208	91.8%	-11.4 min	0.5%

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), April 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	23.4%	32.7%	21,318
Late-arriving aircraft	50.1%	39.4%	45,672
National Aviation System	22.1%	22.2%	20,107
Extreme weather	4.3%	5.5%	3,926
Security	0.1%	0.2%	92

91,115 delay minutes on 1,540 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 2025?

79.5% of 7,959 scheduled domestic departures left less than 15 minutes late, and 80.0% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 79.4% of 7,585 departures left on time and 0.5% were cancelled, against 79.5% and 0.6% in April 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2025; 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.