Jonathan Chacon, 23, was arrested at a hotel in Rosarito Beach in Baja California. He was detained by Mexican authorities, and then released to the custody of the Redondo Beach Police Department, officials said.
Police say the quick arrest was possible thanks to the numerous tips they received.
Authorities had been looking for Chacon since Tuesday after they found the bodies of 19-year-old Courtney Bergman and her mother, Vicki Bergman, inside a home in the 1900 block of Rockefeller Lane.
Chacon, believed to have been dating Courtney Bergman, is accused of murdering her and her mother in their Redondo Beach home just after midnight.
"It looks like it could be related to a domestic issue, but I don't want to offer too much specific information on a possible motive at this time," said Redondo Beach Police Lt. Joseph Hoffman.
Police aren't releasing information on how the two were killed, but it was a co-worker who found the bodies after coming to check on the women Tuesday morning.
Courtney Bergman was a Redondo Shores High School graduate who, friends say, had her ups and downs, but was always smiling.
"She was just an independent girl. She handled things so well," said Courtney Bonsall, a friend of the victim.
Earlier Wednesday, police recovered Chacon's vehicle after someone spotted it just off the 5 Freeway in the Mission Viejo area.
Chacon is scheduled to appear in a Torrance courtroom on Friday.