Route · SJC → SAN · 2020–2025 BTS data
San Jose to San Diego
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SJC to SAN (San Jose to San Diego) ranks #103 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 82.2%
- On-time
- +3.2 pts
- vs US avg
- 55 min
- Delay when late
- 31,755
- Flights
- #103 of 4927
- Corpus placement
Cancelled
0.9%
Best Month
Jan 2024 87%
Worst Month
Dec 2025 66%
Distance
417 mi
Carriers
19
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 396 | 136 | 7 | 1 | WN,OO |
| Nov 2025 | 452 | 121 | 12 | 0 | OO,WN |
| Oct 2025 | 434 | 142 | 6 | 3 | OO,WN |
| Sep 2025 | 398 | 84 | 7 | 0 | WN,OO |
| Aug 2025 | 441 | 122 | 0 | 0 | OO,WN,NK |
| Jul 2025 | 471 | 102 | 4 | 0 | NK,OO,WN |
| Jun 2025 | 474 | 119 | 4 | 0 | OO,WN,NK |
| May 2025 | 484 | 96 | 1 | 0 | NK,OO,WN |
| Apr 2025 | 467 | 103 | 2 | 1 | NK,OO,WN,AS |
| Mar 2025 | 458 | 93 | 4 | 2 | AS,OO,WN,NK |
| Feb 2025 | 396 | 83 | 0 | 1 | AS,OO,WN,NK |
| Jan 2025 | 433 | 59 | 7 | 1 | AS,OO,WN,NK |
| Dec 2024 | 469 | 121 | 18 | 4 | F9,NK,OO,WN |
| Nov 2024 | 474 | 102 | 2 | 1 | OO,NK,WN,AS,F9 |
| Oct 2024 | 529 | 177 | 9 | 4 | AS,OO,WN,NK,F9 |
| Sep 2024 | 514 | 112 | 0 | 0 | WN,NK,OO,F9 |
| Aug 2024 | 546 | 101 | 3 | 1 | F9,NK,WN,OO |
| Jul 2024 | 522 | 138 | 4 | 0 | F9,NK,OO,WN |
| Jun 2024 | 494 | 159 | 4 | 0 | NK,OO,WN |
| May 2024 | 490 | 81 | 0 | 1 | NK,OO,WN |
| Apr 2024 | 449 | 73 | 1 | 0 | NK,OO,WN |
| Mar 2024 | 447 | 94 | 3 | 0 | NK,OO,WN |
| Feb 2024 | 404 | 59 | 6 | 0 | NK,OO,WN |
| Jan 2024 | 431 | 58 | 1 | 1 | NK,WN,OO |
SJC–SAN seasonal on-time pattern
Best: January (89.0%) · weakest: October (76.2%)
Strongest calendar month
January
89.0% on-time · ~432 flights/mo
Busiest calendar month
July
~483 flights/mo avg
Weakest calendar month
October
76.2% on-time · ~451 flights/mo
Cancellation Rate
0.9%
105 of 11,073 flights
Diversion Rate
0.2%
21 of 11,073 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SJC - San Jose
Full on-time, delay-cause, and seasonal performance for San Jose, CA.
SJC on-time profileSAN - San Diego
Full on-time, delay-cause, and seasonal performance for San Diego, CA.
SAN on-time profileCompare the two airports
See SJC and SAN side by side on delays, cancellations, and reliability.
Compare SJC vs SANOrigin-hub reliability standing
Mid-pack among SJC departures
From SJC, this corridor sits with 9 other 75–85% on-time routes out of 31 tracked departures, not the hub's reliability leaders (21 at ≥85%) and not the softest ( 1 below 75%). Destination: San Diego · fleet on-time rank #2287 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SJC–SAN.
Routes with a similar on-time rate
What the Data Says About SJC to SAN
Bureau of Transportation Statistics records show San Jose to San Diego (SJC to SAN) running a 82.2% on-time rate over 31,755 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 54.8 minutes. The 417-mile corridor is served by 19 carriers, and over the last 24 months 0.9% of 11,073 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Jan 2024 posted the strongest performance at 87% on-time, while Dec 2025 came in at just 66% - a 21-point swing worth factoring into travel timing.
On the multi-year calendar, SJC–SAN peaks in January at 89.0% on-time while July carries the heaviest traffic (~483 flights per month) ; the softest month is October at 76.2%, a 12.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SJC to SAN rank among US routes by traffic? ▼
How often are flights delayed from SJC to SAN? ▼
What is the cancellation rate for SJC to SAN? ▼
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Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using SJC–SAN data
SJC–SAN runs 3.2 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare SJC and SAN airport profiles: delay causes and top routes differ even on the same corridor. SJC airport
- If your dates flex, January (89.0% on-time) beats October (76.2%) on this corridor. Seasonal chart
- 4 other routes post a similar 82.2% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.