Just three months after starting weekly nonstop flights to Denver, Southwest Airlines told officials at the Santa Rosa airport it wants to take that schedule daily early next year.
Charles M. Schulz–Sonoma County AirportManager Jon Stout said Southwest last week notified officials at the county-owned facility (code STS) it would increase the frequency of the Colorado route starting March 11, 2027, from its current Saturday schedule. That will follow an eight-month ramp up in flights, starting with five days a week (Thursday–Monday) next month and in September, then nearly daily flights around Thanksgiving and Christmas, and one to a few days a week in between.
The airport handled 92,759 passengers in June, up 24.5% from June 2025 and 27.2% from June 2019, before the coronavirus pandemic. Through June, 409,425 passengers used the airport, an increase of 7.6% from the same period last year and 29% from 2019.
Stout said Charles M. Schulz remains on pace to handle between 950,000 and 1 million passengers by year-end with the airport’s biggest carrier, Alaska Airlines growing traffic during the first six months of the year by 21 percent, to 303,673 passengers, and Delta Air Lines planning to start twice-daily nonstop service to Salt Lake City on Oct. 6.
Growth offsets Avelo Airlines’ departure
Passenger counts declined from January through March 2025 because Avelo Airlines ended service last year and Southwest had not yet entered the market. Traffic accelerated in April after Southwest launched flights and Alaska Airlines added frequencies.
Southwest carried 53,899 passengers through June. Its planes were 67% full in June and 66% full for the first half of the year, levels Stout said were not unexpected for a carrier establishing new routes. The growth more than offset Avelo Airlines’ prior June 2025 traffic of 10,950 passengers and first-half 2025 traffic of 73,380 passengers at the airport. Avelo stopped serving Santa Rosa in May 2025.
Alaska carried 58,934 passengers in June, up 17% from a year earlier. Alaska’s June load factor fell to 79% from 83%, while its year-to-date figure held at 82%.
American Airlines carried 13,748 passengers in June, up 4.3%, although its first-half total declined 6.4% to 51,853. Its June load factor rose to 86% from 70% a year earlier.
Stout attributed American’s fuller flights to its use of smaller aircraft rather than additional demand. The airline operated 89 June departures, the same as last year, but reduced its use of 120-seat Airbus A319 jets and relied more heavily on 76-seat Embraer E175 regional aircraft.
Competition is also increasing on certain nonstop routes, such as San Diego and Las Vegas. For example, both Alaska and Southwest serve San Diego, so their schedules could include as many as five daily flights for that Southern California city. The airport has been studying performance of such competitive routes and plans to augment through a consultant what it can find out from government data, which has a 60-day lag, Stout said.
“Now that we actually have more competition, we’ll be looking at that on a monthly basis as well, because we want to make sure all of our carriers are strong,” Stout said.