81% of flights from Santa Rosa to Los Angeles arrived on time over the past 12 months. That is about the typical U.S. route. The 5 p.m. departures ran on time 86% of the time; the 7 a.m. ones 79%. 8% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for STS → LAX: when a flight was late, it was under 45 minutes late 58% of the time. About 1 in 22 flights landed an hour or more late, and 1 in 122 three hours or more; 3.6% were cancelled outright.
- On time or early81%
- 15–30 min late6.3%
- 30–60 min late4.5%
- 1–2 hours late2.7%
- 2–3 hours late0.9%
- 3+ hours late0.8%
- Diverted0.0%
- Cancelled3.6%
Share of all 853 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Alaska Airlines | 853 | 81% | 3.6% | −6 min | 4.5% | +60 min | SkyWest 81%, Horizon Air 16%, Alaska Airlines 3% |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at STS). Delays build through the day as late planes knock on, so early flights usually do best.
Last flight of the day
On STS → LAX, each airline's last flight of the day was cancelled 0.3% of the time, against 5.5% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 0.9% of the time (earlier flights: 0.8%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| Alaska Airlines | 5:35 p.m. | 0.3% | 0.9% | 5.5% | first flight 6:00 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
By month
Each calendar month pooled over 2023–2026. Best: August (88%). Worst: December (70%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 142 | 74% | 3.5% |
| Tuesday | 98 | — | — |
| Wednesday | 103 | 84% | 1.9% |
| Thursday | 137 | 85% | 1.5% |
| Friday | 137 | 79% | 2.9% |
| Saturday | 97 | — | — |
| Sunday | 139 | 81% | 2.9% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 26 · airline 4 · air traffic/airport 1
Month by month
Not enough months with data to draw a trend.
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Dec 22, 2025 | 3 | 0% | 1 |
| Dec 30, 2025 | 3 | 0% | 1 |
| Nov 2, 2025 | 3 | 33% | 0 |
| Oct 12, 2025 | 3 | 33% | 0 |
| Nov 9, 2025 | 3 | 33% | 0 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Santa Rosa or Los Angeles. None has been clearly more reliable than STS → LAX.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| STS → LAX (this route) | 853 | 81% | 3.6% |
| STS → SNA Charles M. Schulz Sonoma to Orange County John Wayne | 745 | 80% | 0.7% |
| STS → BUR Charles M. Schulz Sonoma to Hollywood Burbank | 799 | 79% | 2.1% |
Questions
How often are flights from STS to LAX on time?
81% of 853 scheduled flights from Santa Rosa, CA to Los Angeles, CA arrived within 15 minutes of schedule between September 2025 and August 2026. 3.6% were cancelled.
What is the best time of day to fly STS to LAX?
Flights scheduled to leave at 5 p.m. were the most reliable (86% on time). The 7 a.m. departures were the least (79%).
What month has the most delays from STS to LAX?
December (70% on time). The best month is August (88%), over 2023–2026.
Is the last flight of the day from STS to LAX more likely to be cancelled?
No, the opposite. Each airline's last STS–LAX flight of the day was cancelled 0.3% of the time over the past year, against 5.5% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- LAX → STS (return)
- Charles M. Schulz Sonoma (STS) delays by hour
- Flights into Los Angeles LAX (LAX)
- Alaska Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.