Friday's trip on a private plane to France was the reality star's first extended trip away from her daughter, even though Kardashian recently picked up a passport for the tot.
"Kim was sad to say goodbye," a source told Us Weekly. "This is the first time she's been away from the baby."
Upon landing in Paris, Kardashian and West met up with former French Vogue editor Carine Roitfeld at the designer Givenchy's offices.
The couple are in town during Paris' Fashion Week.