DUBLIN, July 4 (Reuters) - Ryanair is hopeful

that commercial aircraft will be exempt from any U.S.-EU tariffs

as they would be so disruptive to complex supply chains, Chief

Executive Michael O'Leary said on Friday.

"Commercial aircraft have always been exempt under previous

tariffs ... We think that's likely to be restored even if there

are tariffs applied," O'Leary, whose airline is Boeing's ( BA )

largest customer in Europe, told Ireland's RTE radio.

(Writing by Conor Humphries

Editing by Mark Potter)