Accused Barry Morrow was met by Liverpool detectives off a ferry from France last week.
The strangled bodies of Angela Holgate, 54, and 75-year-old Alice Huyton had been found in Angela's home near Southport, Merseyside, last weekend.
Morrow, 51, was arrested on Thursday and will appear in court tomorrow.
A police spokesman said last night: "He has been remanded in custody to appear at South Sefton Magistrates Court on Monday."
Avon lady Angela and her mother were found by a relative eight days ago.
Post-mortems showed that both died from asphyxiation but Angela - mum to two grown-up daughters - appeared to have died first.
She had been ill when her mother popped round to visit.
Alice had been married to her husband Jim for 55 years and Angela, who was divorced, was their only daughter.
Angela's brother John said the family was "bewildered and devastated at the loss of two very special people".
He said: "Both Alice and Angela were very popular and led active lives and had many friends.
"They meant so much in the eyes of different family members and held the roles of great-grandmother, grandmother, mother, wife, aunty, sister and sister-in-law.
"The sad loss has had a severe impact on the whole family."