Balkan Holidays has cancelled all flights and holidays to Bulgaria up to June 15, 2020, as the impact of the coronavirus on travel continues.
The tour operator is offering customers the chance to rebook to later date up to summer 2021 with no administration fees.
Balance due dates have been moved to four weeks prior to departure, rather than 10 weeks before as was the previous policy.
Balkan Holidays said it will pay travel agents the commission they were due on the original booking when rebookings are confirmed.
Refunds are being offered to customers who choose not to rebook.