Airport reliability
Santa Rosa (STS) on-time performance
How reliably flights leave Santa Rosa, CA (STS) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.
Santa Rosa, CA5,912 departures in 12 months
- Departures on time
- 78.7% U.S. average 75.6%
- Cancelled
- 1.6% U.S. average 1.9%
- 60+ minutes late
- 6.6% U.S. average 8.1%
- Scheduled departures
- 5,912 12 months
What this means
STS departures beat the U.S. average.
- 78.7% of the 5,912 scheduled departures from Santa Rosa (STS) arrived at their destination on time, 3.1 points higher than the U.S. average of 75.6%.
- 1.6% of departures were cancelled (U.S. average 1.9%), and 6.6% arrived an hour or more late.
- Flights arriving at STS were on time 80.2% of the time.
- Among airlines with at least 300 departures, Envoy Air was the most punctual from STS (79.7%) and Southwest Airlines the least (76.8%).
- Over the last 3 years, April was the most reliable month for departures from STS (80.8% on time) and December the least reliable (68.4%).
- Cancellations peaked in December, when 4.4% of flights were cancelled.
- Flights scheduled to depart 7 am to 8 am were the most punctual (84.7% on time); flights scheduled to depart 1 pm to 2 pm were the least (68.6%).
Airlines at STS
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Departures |
|---|---|---|---|---|---|
| Envoy AirSold as American Eagle | 79.7% | 0.4% | 5.3% | 54 min | 512 |
| SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska | 79.2% | 1.9% | 6.8% | 68 min | 4,356 |
| Alaska Airlines | 78.5% | 2.4% | 4.0% | 48 min | 424 |
| Southwest Airlines | 76.8% | 0.2% | 5.5% | 57 min | 542 |
| American Airlines | 53.8% | 0.0% | 24.4% | 94 min | 78 |
Tap a heading to sort.
On-time rate by departure hour
Share of scheduled flights on time STS average 78.7%
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing 6 am to 7 am | 84.5% | 433 |
| Departing 7 am to 8 am | 84.7% | 713 |
| Departing 8 am to 9 am | 77.2% | 92 |
| Departing 9 am to 10 am | 78.7% | 277 |
| Departing 10 am to 11 am | 76.9% | 338 |
| Departing 11 am to noon | 81.9% | 448 |
| Departing noon to 1 pm | 80.3% | 690 |
| Departing 1 pm to 2 pm | 68.6% | 283 |
| Departing 2 pm to 3 pm | 78.4% | 639 |
| Departing 3 pm to 4 pm | 72.3% | 260 |
| Departing 4 pm to 5 pm | 79.2% | 663 |
| Departing 5 pm to 6 pm | 79.2% | 260 |
| Departing 6 pm to 7 pm | 78.5% | 298 |
| Departing 7 pm to 8 pm | 69.2% | 377 |
| Departing 8 pm to 9 pm | 71.1% | 121 |
| Departing 9 pm to 10 pm | Insufficient sample | 20 |
Best and worst months at STS
Share of scheduled flights on time 12-month average 78.7%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 77.3% | 893 |
| February | 78.5% | 804 |
| March | 80.3% | 1,042 |
| April | 80.8% | 1,186 |
| May | 78.5% | 1,286 |
| June | 74.8% | 1,286 |
| July | 74.9% | 1,333 |
| August | 77.1% | 1,406 |
| September | 79.3% | 1,173 |
| October | 79.9% | 1,084 |
| November | 73.8% | 1,186 |
| December | 68.4% | 1,069 |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 80.2% | 484 |
| Oct 2025 | 80.9% | 404 |
| Nov 2025 | 74.4% | 484 |
| Dec 2025 | 59.6% | 406 |
| Jan 2026 | 76.4% | 364 |
| Feb 2026 | 84.2% | 323 |
| Mar 2026 | 85.6% | 443 |
| Apr 2026 | 84.1% | 558 |
| May 2026 | 82.9% | 589 |
| Jun 2026 | 80.0% | 595 |
| Jul 2026 | 77.6% | 629 |
| Aug 2026 | 76.5% | 633 |
Busiest routes from STS
| To | On time | Cancelled | Airlines | Flights |
|---|---|---|---|---|
| San Diego (SAN) | 70.9% | 3.0% | 2 | 1,060 |
| Santa Ana (SNA) | 79.9% | 0.7% | 1 | 745 |
| Burbank (BUR) | 80.0% | 2.3% | 2 | 741 |
| Los Angeles (LAX) | 83.3% | 2.8% | 2 | 714 |
| Phoenix (PHX) | 74.7% | 0.4% | 3 | 693 |
| Portland (PDX) | 88.9% | 1.6% | 2 | 624 |
| Seattle (SEA) | 76.7% | 1.1% | 2 | 454 |
| Las Vegas (LAS) | 78.8% | 0.5% | 3 | 378 |
| Dallas/Fort Worth (DFW) | 71.9% | 0.0% | 2 | 185 |
| Palm Springs (PSP) | 80.3% | 2.1% | 1 | 142 |
| Ontario (ONT) | 90.6% | 0.0% | 1 | 139 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Scheduled nonstop domestic departures from Santa Rosa, CA (STS) by airlines that report to the DOT.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.