So did she cap off her trip with an engagement?
Not quite ... Aniston, 43, prominently wears two rings: The diamond ring on her right hand is a ring that she's worn several times over the last year. The gold band that spells her name on her left ring finger is a ring she's also had since she started dating Theroux, 40, who has a matching one!
While photos of the couple, who began dating last May, at LAX set off a fresh round of engagement rumors, "it's the same ring she has worn forever on her right hand," a source tells PEOPLE.
Potential wedding bells aside, Aniston seems to be enjoying life with Theroux. Her happiness level is at "10-plus," she said earlier this year – before this trip which included yachting in the Mediterranean and stops in Paris and in Rome.
Reporting by JULIE JORDAN
Sipa; Everett; X17Online