Get Currency From Your Bank Rather Than the Airport
It's important to have the currency of the country you're visiting once you arrive, especially since not all places accept credit cards. You will typically get a much better conversion rate with your local bank than at the airport, and you can get the cash in less than a week. Once you've arrived to your destination, if you run low on cash, use a local ATM to stock up on money as the fees are usually much lower and the conversion rate is exact. The best case scenario? If you bank with a large international entity, see if you can find an ATM for your bank.