In general when looking for the cheapest flight to Antananarivo, try to book your flight during the month of February for the best deal.
On average, from most locations, when planning your trip to Antananarivo, try to book your flight in the region of 60 days in advance for the cheapest prices.
In general, booking your departure to Antananarivo for a Wednesday represents the best deal on airfare. Try to avoid a Sunday departure to stay away from the highest prices.
Generally, when visiting Antananarivo, afternoon flights represent the best value. morning flights are likely to have higher prices.