Lowlands Summer - weather is warm and reasonably dry from May to September. Cheap flights are still possible in this amount of economic downturn. The Old Quarter of Hanoi considered liveliest neighbourhoods. In part this is due to its comparative inaccessiblity/ however, the opening of an every day air service https://botdb.win/wiki/Discovering_Saigon_5_Places_In_Vietnam_You_In_Order_To_Visit