Route · STS → SAN · 2020–2025 BTS data
Santa Rosa to San Diego
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STS to SAN (Santa Rosa to San Diego) ranks #3242 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 77.9%
- On-time
- -1.1 pts
- vs US avg
- 62 min
- Delay when late
- 3,163
- Flights
- #3242 of 4927
- Corpus placement
Cancelled
2.4%
Best Month
Jul 2025 85%
Worst Month
Nov 2024 48%
Distance
508 mi
Carriers
5
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 52 | 17 | 5 | 1 | OO |
| Nov 2025 | 88 | 20 | 8 | 0 | OO |
| Oct 2025 | 86 | 16 | 4 | 0 | OO |
| Sep 2025 | 81 | 22 | 2 | 0 | OO |
| Aug 2025 | 71 | 16 | 0 | 0 | OO |
| Jul 2025 | 61 | 9 | 0 | 0 | OO |
| Jun 2025 | 59 | 18 | 0 | 0 | OO |
| May 2025 | 62 | 21 | 0 | 0 | OO |
| Apr 2025 | 60 | 17 | 1 | 1 | OO |
| Mar 2025 | 54 | 15 | 1 | 1 | OO |
| Feb 2025 | 44 | 9 | 4 | 0 | OO |
| Jan 2025 | 53 | 12 | 4 | 1 | OO |
| Dec 2024 | 68 | 18 | 2 | 2 | OO |
| Nov 2024 | 79 | 41 | 2 | 0 | OO |
| Oct 2024 | 79 | 23 | 2 | 0 | OO |
| Sep 2024 | 60 | 19 | 0 | 0 | OO |
| Aug 2024 | 62 | 14 | 0 | 1 | OO |
| Jul 2024 | 62 | 18 | 0 | 0 | OO |
| Jun 2024 | 48 | 12 | 0 | 0 | OO |
| May 2024 | 46 | 14 | 1 | 0 | OO |
| Apr 2024 | 58 | 10 | 0 | 0 | OO |
| Mar 2024 | 54 | 17 | 0 | 0 | OO |
| Feb 2024 | 46 | 14 | 0 | 0 | OO |
| Jan 2024 | 51 | 10 | 0 | 0 | OO |
STS–SAN seasonal on-time pattern
Best: April (83.0%) · weakest: December (70.8%)
Strongest calendar month
April
83.0% on-time · ~45 flights/mo
Busiest calendar month
October
~62 flights/mo avg
Weakest calendar month
December
70.8% on-time · ~51 flights/mo
Cancellation Rate
2.4%
36 of 1,484 flights
Diversion Rate
0.5%
7 of 1,484 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
STS - Santa Rosa
Full on-time, delay-cause, and seasonal performance for Santa Rosa, CA.
STS 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 STS and SAN side by side on delays, cancellations, and reliability.
Compare STS vs SANOrigin-hub reliability standing
Mid-pack among STS departures
From STS, this corridor sits with 7 other 75–85% on-time routes out of 8 tracked departures, not the hub's reliability leaders (1 at ≥85%) and not the softest ( 0 below 75%). Destination: San Diego · fleet on-time rank #3879 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to STS–SAN.
Routes with a similar on-time rate
What the Data Says About STS to SAN
The Santa Rosa to San Diego corridor (STS to SAN) posts a 77.9% on-time rate on the lower edge of the average band, based on 3,163 tracked flights. Late flights run 62.1 minutes behind on average. 5 carriers cover the 508-mile route; over the last 24 months, 36 of 1,484 flights were cancelled (2.4%) and 0.5% diverted.
The monthly split is wide on this route: Jul 2025 posted the strongest performance at 85% on-time, while Nov 2024 came in at just 48% - a 37-point swing worth factoring into travel timing.
On the multi-year calendar, STS–SAN peaks in April at 83.0% on-time while October carries the heaviest traffic (~62 flights per month) ; the softest month is December at 70.8%, a 12.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does STS to SAN rank among US routes by traffic? ▼
How often are flights delayed from STS to SAN? ▼
What is the cancellation rate for STS to SAN? ▼
How far is the flight from STS to SAN? ▼
When is the best time to fly from STS to SAN? ▼
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 STS–SAN data
STS–SAN is mid-pack at 77.9% on-time; month and carrier mix move more than the corridor headline.
- Compare STS and SAN airport profiles: delay causes and top routes differ even on the same corridor. STS airport
- If your dates flex, April (83.0% on-time) beats December (70.8%) on this corridor. Seasonal chart
- 4 other routes post a similar 77.9% 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.