Typically, the answer depends on which currencies you’re looking to convert and which country you’re travelling to. It’s advised to switch over some of your travel money for local currency before you travel as a contingency plan. Whether that’s for a taxi from the airport or your first night’s stay in a hotel if your accommodation hasn’t already been arranged. So, if you’re planning to travel with cash, shop around for the best exchange rates before making any decisions – you may find that it’s often cheaper to get it exchanged after you travel. But bear in mind that making a cash withdrawal abroad can become expensive – as you may be charged with a cash withdrawal fee and a non-sterling transaction fee.