But five students and one teacher remain under quarantine in a hospital in Yichang, China, said Pacific Ridge School spokeswoman Anne Carr.
One discharged teacher remained at a nearby hotel to help chaperone the remaining students upon their release, she said.
Half of the traveling group was scheduled to arrive at Los Angeles International Airport at 5:30 p.m. Saturday, while a second group of students arrived at LAX at 10 p.m., according to Carr.
The groups was then taken by bus to Pacific Ridge School in Carlsbad.
The San Diego Union-Tribune reported earlier this week that all 42 members of the group -- 35 ninth-graders and seven teachers - received the anti-viral medication Tamiflu, although only a few actually contracted swine flu.
The decision to quarantine the group and treat everyone is consistent with the protocol the World Health Organization set up when they declared a swine flu pandemic last week. Also known as the H1N1 virus, the flu has stricken nearly 36,000 people worldwide since earlier this year, according to WHO.
As of Thursday afternoon, there were 290 confirmed cases of the virus in San Diego County. On Monday, the first death from swine flu was reported in the county.
A 20-year-old, otherwise healthy woman from San Marcos died in the emergency room at Palomar Medical Center in Escondido just one day after developing symptoms, according to San Diego's public health officer, Dr. Wilma Wooten.
