Custom map showing route between 2 cities

Hello my PBI mates,

I have air travel data and a column which shows city-pairs(consisting names of cities travelled to and from eg: London-Adelaide), the other column consists of passenger data travelled from that route.

I want to show the city-pair route on the world map and the route should also show the thickness ie more the passengers, more thicker the route(or it could also be color coded).