3180 NW 229th Avenue
Hillsboro, Oregon 97124
Phone: (503) 615-3200 or (800) 847-3806
Fax: (503) 615-3300
Office Hours: 7:30 a.m. to 4:00 p.m., Pacific Time, Monday - Friday
Email the Office
Appointments are recommended for office visits.

Who We Are

  • Service Area
    The Portland CMO oversees the 14 CFR Part 121 certificate for Horizon Air, which includes aircraft maintenance, aircrew training, and U. S. and international flight operations.
  • Directions to the Office
  • Employee Directory (PDF)