The airline and operator will serve eight ski gateways – Chambery, Geneva, Grenoble, Salzburg, Innsbruck, Lyon, Turin and Verona.
Flights have gone on sale from Belfast International, Bristol, Birmingham, East Midlands, Edinburgh, Leeds Bradford, Glasgow, Manchester, Newcastle and Stansted.
New additions for the 2025/26 season include a second Newcastle-Geneva Saturday service.
In total, Jet2 has put 300,000 ski seats on sale, and will operate up to 34 weekly flights during peak periods.
Steve Heapy, Jet2.com and Jet2holidays chief executive, said the airline and operator was responding to customer demand to book ahead for the winter after next.
