Bangkok has beaten London to be crowned the world's most popular travel destination this year, according to an annual ranking by global payments and technology company Mastercard released on Thursday.

Tourism has been one of the rare bright spots for Thailand, Southeast Asia's second-largest economy, which has grappled with weak consumer confidence and exports after a 2014 coup the military said was aimed at ending months of political unrest.

Last month's wave of bomb blasts in southern Thailand, which police have blamed on Muslim separatists, appears to have had a limited impact on tourism.