Custom map showing route between 2 cities

[Anonymous]

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).

Any leads on this would be appreciated. Thank-you!