Route on-time record

SJC to SAN: most on-time flights and the best time to fly

San Jose (Norman Y. Mineta San Jose International Airport) to San Diego (San Diego International Airport). 4,990 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 1.1% were cancelled. The most reliable flight number was Southwest 4138 at 6:55 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

SJC → SAN

San Jose to San Diego: 4,990 nonstop flights a year

On time (12 months)

74%

Cancelled

1.1%

avg delay 14 min

Best time to leave

Before 9 AM

89% on time vs 59% 6 to 9 PM

Most reliable airline

SkyWest

77% chance on time

Check SJC to SAN fares

Lowest nonstop fare seen in the next two months: $67 (Alaska 466 on 2026-11-03). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

#1 · Southwest 4138
6:55 AM → 8:20 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1599; its record covers all of them.
92%
chance on time
On time (history)
97%
Cancelled
2.7%
Avg arrival delay
2 min
- Arrived on time 97% of the time (72 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Moderate track record · 72 flights
Find Southwest 4138 fares Opens this date on Aviasales
#2 · Alaska 1371
7:06 AM → 8:39 AM1h 33m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
0 min
- Arrived on time 100% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (19 flights), so its score leans on the route's record at this hour.
Limited track record · 19 flights
Find Alaska 1371 fares Opens this date on Aviasales
#3 · Southwest 1430
9:25 AM → 10:50 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
88%
chance on time
On time (history)
96%
Cancelled
3.6%
Avg arrival delay
3 min
- Arrived on time 96% of the time (27 flights, Jun 2025 to May 2026).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (27 flights), so its score leans on the airline's record at this hour.
Limited track record · 27 flights
Find Southwest 1430 fares Opens this date on Aviasales
#4 · Southwest 4065
9:10 AM → 10:35 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-30.
87%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 90% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Southwest 4065 fares Opens this date on Aviasales
#5 · SkyWest 3458 · sold as United Express, Delta Connection, American Eagle or Alaska
7:00 AM → 8:32 AM1h 32m nonstop
Local times, typical schedule. Last flown 2026-05-12.
87%
chance on time
On time (history)
88%
Cancelled
1.7%
Avg arrival delay
11 min
- Arrived on time 88% of the time (292 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Strong track record · 292 flights
Find 7:00 AM flight fares Opens this date on Aviasales
#6 · Southwest 1582
7:25 AM → 8:50 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-30.
86%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1582 fares Opens this date on Aviasales
#7 · Southwest 1933
8:35 AM → 10:00 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-01.
83%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1933 fares Opens this date on Aviasales
#8 · Southwest 887
8:00 AM → 9:25 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
80%
chance on time
On time (history)
85%
Cancelled
0.0%
Avg arrival delay
14 min
- Arrived on time 85% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 887 fares Opens this date on Aviasales
#9 · Southwest 3459
12:00 PM → 1:20 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-04-06.
80%
chance on time
On time (history)
89%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 89% of the time (28 flights, Jun 2025 to May 2026).
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 3459 fares Opens this date on Aviasales
#10 · Southwest 2291
12:45 PM → 2:05 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-04-06.
78%
chance on time
On time (history)
86%
Cancelled
0.0%
Avg arrival delay
9 min
- Arrived on time 86% of the time (28 flights, Jun 2025 to May 2026).
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 2291 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)77%
1,182 flights · 78% on time as flown · 1.2% cancel
Southwest Airlines72%
3,746 flights · 73% on time as flown · 1.0% cancel
Spirit Airlines71%
43 flights · 70% on time as flown · 0.8% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM89%
1,114 flights · avg delay 7 min
9 AM to noon76%
1,086 flights · avg delay 12 min
Noon to 3 PM74%
878 flights · avg delay 13 min
3 to 6 PM68%
981 flights · avg delay 16 min
6 to 9 PM59%
831 flights · avg delay 22 min

Best day: Tuesday (86%). Worst: Friday (68%).

Smarter routing

Nearby airports that run more on time

MRY → SAN 78% chance on time
Monterey Regional Airport to San Diego International Airport · 557 flights a year · 54 mi from your airports · yours: 73%
Rank flights Fares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

What delays this route

Late-arriving aircraft41%
Air traffic control and airport volume36%
Airline (crew, maintenance, boarding)21%
Severe weather2%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

SJC to SAN questions

What time of day is best to fly SJC to SAN?: Before 9 AM: 89% of flights arrived on time, against 59% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from SJC to SAN?: SkyWest, with a season-adjusted 77% chance of operating and arriving on time over 1,182 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on SJC to SAN?: October (70% on time); the best was January (85%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?: No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

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