The tour operator has revealed that there will be over 10,000 additional seats now on sale and the season will be extended from several airports in the UK.
Additional flights to popular destinations such as Budapest, Copenhagen and Vienna have been introduced for the coming winter.
Jet2 will run its largest Christmas markets programme in the winter of 2025-26 - offering over 305,000 seats in a 27 per cent year-on-year capacity increase.
The festive flights will be heading to nine destinations - Berlin, Budapest, Cologne, Copenhagen, Gdansk, Krakow, Prague, Tallinn and Vienna - from 12 UK airports: Belfast International, Birmingham, Bournemouth, Bristol, East Midlands, Edinburgh, Glasgow, Leeds Bradford, Liverpool John Lennon, Manchester, Newcastle and Stansted.
Steve Heapy, CEO of Jet2.com and Jet2holidays, said: "This announcement represents a significant expansion to our winter 2025-26 Christmas markets programme. The expansion comes in direct response to the strong demand we are seeing from customers and independent travel agents."
He added: "Our winter 2025-26 Christmas markets programme promises to be our best yet."
East Midlands is set to enjoy more services to Vienna from November 21, marking an extended season.
Edinburgh's season to the Austrian capital will also be lengthened as services will now begin from November 13.
Glasgow will get new Monday and Friday services to Budapest running from November 21 until December 22 while Leeds Bradford will also receive additional Monday and Friday services to Copenhagen from November 21-24.
Manchester can look forward to extra Monday and Friday flights to Gdansk from December 26 to January 5, 2026, as well as an earlier start to the Vienna season from November 14.