Thomas Cook has cancelled holidays to Tunisia until mid February, after which it will resume its service offering three flights a week.
The operator said customers due to travel up to February 13 will be able to cancel or amend their bookings free of charge.
Package holiday customers who wish to switch to another winter sun destination will be offered a £50 voucher to re-book their holiday, as long as their holiday is on a charter flight.
Customers who want to re-book for a summer 2015 or summer 2016 holiday will also be offered a free swap.
Thomas Cook said the decision to suspend its winter programme followed confirmation from the Foreign Office that the state of emergency in Tunisia has been extended to the end of September.
As a result, the Foreign Office is continuing to advise against all but essential travel to the country, which is continuing to search for those behind the massacre of 38 tourists, including 30 Britons, in the beach resort of Sousse on June 26.
Thomas Cook said it will restart flights and its holiday programme to Tunisia from February 14.
The company has also suspended its programme to Tunisia from five other regions but it is continuing to sell holidays from Germany, where the government is not advising against travel.
