Dollar to euro
Use credit cards instead of cash whenever possible.
nIf you must pay in Euro currency in larger amounts over time, say u20ac5000 in 10 withdrawals of u20ac500 each.
Then it makes sense to plan ahead.
nOpen or maintain a checking or savings account nin a major bank with correspondence European bank in the destination country.
nWithdraw from ATM of the European bank will get you the best rates.
,For example, if your destination is Germany, use Bank of America debit Card at a Deutsche Bank Geldautomat (ATM) will give you better rate than any airport exchange.