100 High StPortsmouth, NH 03801 Phone: +1 603-431-1499Fax: +1 603-431-1477Toll Free: +877-STAY-HGI Hotel E-mailHotel Website Classification 4 Moderate First Class Commission Rooms Rates 10% 136 - Hoteliers! Is your information accurate? Update Here Hilton Garden Inn Portsmouth Downtown Location & Neighborhood 55 MI from Edward L Logan Intl airport.