Brent futures for July fell 63 cents, or 0.56%, to $111.41 a barrel by 0432 GMT, while U.S. West Texas Intermediate (WTI) crude for June fell $1.36, or 1.21%, to $110.85 on its last day as the front-month.
The more actively traded WTI contract for July was down 0.82% at $108.99 a barrel.