Jet2.com will extend its Athens service from both Manchester and Birmingham airports into the shoulder months.
Its summer flights will continue until 27 November and resume again on 16 February.
They will operate up to twice a week, on Thursdays and Sundays.
This will allow Jet2CityBreaks to offer late autumn and early spring packages to Athens for the first time.
Jet2 launched its first summer flights to Athens this year.
In total, Jet2.com and Jet2CityBreaks will operate to 12 city break destinations in winter 22/23 and to six Christmas markets.