Though workers from SNPNC-FO and UNAC unions said their strike is to start on Christmas, there are no flights scheduled that day, so the walkout will affect only those flying on Friday.
EasyJet said 38 flights would be cancelled, mainly serving French domestic routes, as well as those to Milan and Barcelona.
The workers are upset over frequent last-minute changes to their schedules and have demanded a larger share of the company's profits.
EasyJet employs some 600 flight attendants among its roughly 1,000 workers in France.
EasyJet's boss in France Francois Bacchetta has said he understands the "frustration" of the cabin staff and added that the company was working on this "very complex" issue.