Most travellers find the cheapest return airfare to Bulgaria when booking during the month of January.
From most locations, booking your flights to Bulgaria around 54 days prior to your departure date finds the best deals.
In general, booking your departure to Bulgaria for a Monday represents the best deal on airfare. Try to avoid a Saturday departure to stay away from the highest prices.
Generally, when visiting Bulgaria, midday flights represent the best value. evening flights are likely to have higher prices.