Is there a bank in the airport for exchanging u.s. currency to euro's

There are a few Currency Exchange services located at A29, D11, D22 (Outside Security), D24, and D36, International Re-Check area. For on-site banks, there are a couple of American Airlines Credit Unions located at A24 (Outside Security), C12 (Outside Security), D30 (Outside Security). We hope that helps.

Yee

Thete are several stores called Travelex in the international terminal, terminal D, where you can exchange currency.