ONEWEST Bank Address: 5791 Alton Pkwy, Irvine, CA 92618 Phone: (949) 726-0440 Hours: Mon: 9am-5pm Tue: 9am-5pm Wed: 9am-5pm Thu: 9am-5pm Fri: 9am-6pm Sat: 9am-1pm Banks, Onewest Bank Other Businesses: Citibank at 5511 Alton Parkway, Irvine, CA 92618 Chase ATM at 5521 Alton Pkwy, Irvine, CA 92618 Union Bank at 5365 Alton Pkwy, Irvine, CA 92604 Citibank ATM at 5511 Alton Parkway, Irvine, CA 92618 Union Bank at 5311 University Dr, Irvine, CA 92612