San Diego International in September 2024

82.1%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 September 2024, reporting carriers scheduled 7,942 domestic departures from San Diego International (SAN). 82.1% left less than 15 minutes late and 78.6% reached their destination on time; 0.3% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so SAN departures were 2.3 points below the national departure figure.

A year earlier, in September 2023, the airport had 7,612 departures with 82.9% leaving on time: a change of −0.8 points, with flights up 4%.

Flights arriving at SAN that month were on time 78.3% of the time (7,938 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, national aviation system 30% and air carrier 24%.

On time 78.6%
Arrived 15+ minutes late 20.9%
Cancelled 0.3%
Diverted 0.2%

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

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

Measure	Sep 2024	Sep 2023	SAN, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	82.1%	82.9%	73.5%	84.4%
Arrived on time	78.6%	83.9%	76.1%	83.9%
Cancelled	0.3%	0.6%	1.3%	0.6%
Average departure delay (late minutes only)	11.0 min	10.8 min	16.6 min	10.6 min
Scheduled departures a day	265	254	275	19,421
Scheduled departures	7,942	7,612	100,196	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,885	36%	76.9%	5.2 min	0.1%
OO SkyWest Airlines	990	12%	75.2%	8.9 min	0.2%
AS Alaska Airlines	879	11%	77.5%	5.6 min	0.8%
UA United Airlines	869	11%	86.9%	-4.9 min	0.1%
DL Delta Air Lines	805	10%	86.3%	-0.9 min	0.1%
AA American Airlines	719	9%	82.1%	4.4 min	0.4%
F9 Frontier Airlines	329	4%	69.6%	13.6 min	0.6%
NK Spirit Airlines	262	3%	70.2%	9.2 min	1.1%
B6 JetBlue Airways	135	2%	77.0%	3.7 min	0.0%
HA Hawaiian Airlines	60	1%	61.7%	24.7 min	0.0%
G4 Allegiant Air	9	0%	44.4%	24.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SAN–SFO	San Diego to San Francisco	574	68.5%	11.6 min	0.3%
SAN–LAS	San Diego to Las Vegas	558	69.5%	12.5 min	0.7%
SAN–SJC	San Diego to San Jose	514	77.4%	5.9 min	0.4%
SAN–SMF	San Diego to Sacramento	468	73.7%	8.0 min	0.0%
SAN–DEN	San Diego to Denver	459	85.6%	-2.5 min	0.0%
SAN–PHX	San Diego to Phoenix	457	80.5%	4.8 min	0.2%
SAN–SEA	San Diego to Seattle	423	79.0%	4.5 min	0.5%
SAN–OAK	San Diego to Oakland	304	75.0%	7.3 min	0.3%
SAN–DFW	San Diego to Dallas/Fort Worth	257	78.6%	8.8 min	0.0%
SAN–ORD	San Diego to Chicago	246	88.6%	-3.0 min	0.0%
SAN–ATL	San Diego to Atlanta	218	81.7%	7.9 min	0.0%
SAN–JFK	San Diego to New York	210	87.6%	-5.3 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), September 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2024	Minutes
Air carrier	24.0%	38.6%	21,224
Late-arriving aircraft	43.1%	38.4%	38,199
National Aviation System	29.8%	18.2%	26,398
Extreme weather	3.1%	4.8%	2,724
Security	0.0%	0.1%	16

88,561 delay minutes on 1,662 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 September 2024?

82.1% of 7,942 scheduled domestic departures left less than 15 minutes late, and 78.6% reached their destination on time. The national figures that month were 84.4% and 83.9%.

How does that compare with a year earlier?

In September 2023, 82.9% of 7,612 departures left on time and 0.6% were cancelled, against 82.1% and 0.3% in September 2024.

Provenance

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