Europe:
Visit Northern Europe in April-May and September-November. Southern Europe is cheapest in winter (November-March), excluding Christmas and New Year.
Asia:
Autumn (September-November) is cheapest for East Asia. South Asia's best deals are in summer (May-August), and Southeast Asia during monsoon seasons.
South America:
The US summer (May-August) is South America's mild winter and the cheapest. Central America is affordable during the rainy season (May-November).
Africa:
Northern Africa is cheapest in spring and autumn. East Africa offers deals during the rainy season (April-May). Southern Africa's best prices are November-March.
Australia & Oceania:The best time to visit New Zealand and Australia is in March and April, with few tourists and mild weather.