San Diego International in January 2025

81.8%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 January 2025, reporting carriers scheduled 7,189 domestic departures from San Diego International (SAN). 81.8% left less than 15 minutes late and 81.8% reached their destination on time; 1.6% were cancelled.

Nationally that month, 79.3% of flights departed on time and 78.6% arrived on time, so SAN departures were 2.5 points above the national departure figure.

A year earlier, in January 2024, the airport had 7,075 departures with 78.3% leaving on time: a change of +3.5 points, with flights up 2%.

Flights arriving at SAN that month were on time 79.6% of the time (7,189 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 54%, air carrier 21% and national aviation system 15%.

On time 81.8%
Arrived 15+ minutes late 16.2%
Cancelled 1.6%
Diverted 0.4%

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

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

Measure	Jan 2025	Jan 2024	SAN, 12 months to Jul 2026	All reported flights, Jan 2025
Departed on time	81.8%	78.3%	73.5%	79.3%
Arrived on time	81.8%	77.4%	76.1%	78.6%
Cancelled	1.6%	5.0%	1.3%	3.0%
Average departure delay (late minutes only)	13.2 min	12.5 min	16.6 min	14.0 min
Scheduled departures a day	240	236	275	17,992
Scheduled departures	7,189	7,075	100,196	539,747

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,521	35%	83.7%	-0.2 min	1.9%
OO SkyWest Airlines	1,129	16%	73.1%	9.9 min	1.8%
UA United Airlines	794	11%	84.3%	-0.5 min	1.0%
AS Alaska Airlines	738	10%	82.1%	1.5 min	0.9%
AA American Airlines	720	10%	82.4%	5.0 min	2.8%
DL Delta Air Lines	705	10%	85.5%	4.3 min	0.9%
F9 Frontier Airlines	212	3%	76.9%	17.1 min	1.4%
NK Spirit Airlines	176	2%	88.1%	1.0 min	1.7%
B6 JetBlue Airways	123	2%	83.7%	2.0 min	0.0%
HA Hawaiian Airlines	62	1%	83.9%	-0.2 min	0.0%
G4 Allegiant Air	9	0%	66.7%	7.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SAN–LAS	San Diego to Las Vegas	584	79.1%	7.7 min	1.9%
SAN–SFO	San Diego to San Francisco	523	79.3%	3.8 min	1.0%
SAN–PHX	San Diego to Phoenix	442	86.0%	3.6 min	0.7%
SAN–DEN	San Diego to Denver	428	82.7%	3.0 min	1.2%
SAN–SJC	San Diego to San Jose	427	84.8%	-1.3 min	1.4%
SAN–SMF	San Diego to Sacramento	391	84.7%	-1.4 min	1.8%
SAN–SEA	San Diego to Seattle	346	83.5%	3.0 min	0.6%
SAN–DFW	San Diego to Dallas/Fort Worth	244	75.4%	11.8 min	6.6%
SAN–OAK	San Diego to Oakland	242	86.8%	-5.9 min	2.1%
SAN–SLC	San Diego to Salt Lake City	209	83.7%	5.1 min	0.0%
SAN–ORD	San Diego to Chicago	190	80.0%	2.5 min	0.5%
SAN–LAX	San Diego to Los Angeles	181	88.4%	-1.2 min	0.0%

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), January 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2025	Minutes
Air carrier	21.1%	36.2%	17,962
Late-arriving aircraft	54.3%	34.7%	46,245
National Aviation System	15.1%	19.9%	12,863
Extreme weather	9.3%	9.1%	7,931
Security	0.2%	0.2%	133

85,134 delay minutes on 1,165 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 January 2025?

81.8% of 7,189 scheduled domestic departures left less than 15 minutes late, and 81.8% reached their destination on time. The national figures that month were 79.3% and 78.6%.

How does that compare with a year earlier?

In January 2024, 78.3% of 7,075 departures left on time and 5.0% were cancelled, against 81.8% and 1.6% in January 2025.

Provenance

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