Airport month record

SANJUL

San Diego International in July 2025

Departures: 8,776
Month: July 2025
National, same month: 71.1%
Carriers: 11

Historical statistics for July 2025, not live status or a forecast for this year’s July. For today’s conditions at SAN, see live FAA status.

SAN in July sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points better than the national rate of 71.1%. The late ones land about an hour behind schedule. That rests on 8,776 flights, of which Delta Air Lines flew 849 at 81.9% on time.

Delta Air Lines is the most reliable of the six carriers covered here at 81.9% on time across 849 flights.

On time

73.9%

Arrivals under 15 minutes late, of 8,617 completed departures

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

1.32%

Nationally in July: 2.45%

Whole year

78.0%

SAN across all twelve months

These figures cover 8,776 departures from San Diego International in July 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

July next to SAN's other months

Against SAN's own year, July ran 4 points worse than the twelve-month rate of 78.0%, which makes it number eleven of twelve months, best first.

SAN month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025 (this page)	8,776	73.9%	62 min	1.32%	C
August 2025	8,406	76.7%	58 min	0.75%	B+
September 2025	7,875	81.9%	74 min	1.37%	B
October 2025	8,687	79.0%	63 min	0.92%	B+
November 2025	8,246	77.1%	65 min	2.81%	B
December 2025	8,228	75.4%	63 min	1.42%	B
January 2026	7,406	83.1%	79 min	2.71%	B
February 2026	7,008	84.0%	64 min	0.97%	B+
March 2026	8,547	78.2%	64 min	1.03%	B
April 2026	8,505	80.8%	54 min	0.33%	B+
May 2026	8,947	76.9%	54 min	0.66%	B+
June 2026	8,996	71.1%	55 min	1.00%	C

Departure window

The best time of day to leave SAN in July

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 28 points, against 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,327 flights90.1%
8am–11am1,802 flights81.6%
11am–2pm1,678 flights69.7%
2pm–5pm1,254 flights65.9%
5pm–8pm1,343 flights62.2%
8pm–5am1,372 flights72.0%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 62.2% on time, against 90.1% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 1,802 flights scheduled in it.

Across the week, Saturday is the strongest day at 79.5% on time and Thursday the weakest at 69.1%. 10 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at SAN in July

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 81.9% of the time; Alaska Airlines manages 71.4%. Sample sizes sit next to every figure, because a two-point gap across 975 flights means less than a ten-point one.

Carriers at SAN in July 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	3,127	71.7%	54 min	0.70%	C+
SkyWest Airlines	1,353	76.4%	59 min	0.81%	B+
Alaska Airlines	975	71.4%	54 min	3.18%	C−
United Airlines	912	75.5%	61 min	1.43%	B
American Airlines	886	77.5%	103 min	1.81%	B
Delta Air Lines	849	81.9%	56 min	0.94%	B+
Frontier Airlinesthin sample	266	62.3%	68 min	3.01%	D−
JetBlue Airwaysthin sample	151	74.8%	97 min	2.65%	C
Spirit Airlinesthin sample	139	79.6%	61 min	1.44%	B
Hawaiian Airlinesthin sample	84	43.4%	84 min	1.19%	F
Allegiant Airthin sample	34	47.1%	62 min	0.00%	F+

Alaska Airlines cancels 3.2% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Route by route

Busiest routes out of SAN in July

Routes from SAN in July 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
SAN to LAS · Las Vegas	646	74.2%	69 min	1.39%	C
SAN to SFO · San Francisco	582	63.9%	60 min	1.03%	D
SAN to PHX · Phoenix	473	76.4%	55 min	1.27%	B
SAN to SJC · San Jose	471	78.0%	57 min	0.64%	B+
SAN to SMF · Sacramento	465	71.9%	50 min	0.43%	C+
SAN to DEN · Denver	458	68.5%	64 min	0.44%	C+
SAN to SEA · Seattle	446	75.2%	53 min	2.47%	B
SAN to ORD · Chicagothin sample	336	71.3%	76 min	1.49%	C
SAN to DFW · Dallas-Fort Worththin sample	335	73.0%	85 min	2.99%	C
SAN to OAK · Oaklandthin sample	288	75.4%	49 min	1.39%	B
SAN to ATL · Atlantathin sample	230	78.6%	48 min	0.87%	B+
SAN to SLC · Salt Lake Citythin sample	221	79.1%	62 min	0.00%	B+
SAN to JFK · New Yorkthin sample	213	75.6%	84 min	5.16%	B−
SAN to LAX · Los Angelesthin sample	209	93.3%	104 min	0.00%	A+
SAN to AUS · Austinthin sample	205	68.6%	55 min	0.00%	C+
SAN to BOS · Bostonthin sample	181	70.6%	54 min	1.66%	C
SAN to PDX · Portlandthin sample	157	81.8%	52 min	1.91%	B
SAN to EWR · Newarkthin sample	154	77.1%	75 min	5.84%	B−
SAN to CLT · Charlottethin sample	152	85.4%	104 min	0.66%	A+
SAN to HNL · Honoluluthin sample	146	56.9%	72 min	1.37%	D
SAN to IAH · Houstonthin sample	141	75.7%	58 min	2.13%	B
SAN to DAL · Dallasthin sample	141	73.5%	59 min	2.13%	C
SAN to DTW · Detroitthin sample	133	80.3%	45 min	0.75%	B+
SAN to FAT · Fresnothin sample	123	72.1%	44 min	0.81%	C+
SAN to IAD · Washingtonthin sample	122	78.3%	59 min	0.00%	B+

Delay causes

What held SAN up in July

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 139,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
45%
Carrier
31%
National Airspace System
22%
Extreme weather
2%
Security
0%

45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 139,000 reported delay minutes here, that single category outweighs weather by 30 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 139,162 reported delay minutes.

Cancellations sit at 1.32% against a national 2.45%, which is ordinary. Diversions add another 0.49%.

7.9% of arrivals land an hour or more late, close to the national 12.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

What to do with this

Flying from SAN in July

For a July trip through SAN: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 90.1% on time, and with 7.9% of arrivals an hour or more late, a connection here deserves more slack than the same trip in February would.

San Diego International (SAN), the whole year
SAN in August76.7%
SAN in September81.9%
SAN in October79.0%
SAN in November77.1%
SAN in December75.4%
SAN in January83.1%
SAN in February84.0%
SAN in March78.2%
SAN in April80.8%
SAN in May76.9%
SAN in June71.1%

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures