Rouses Point SPB (New York / Quebec) Van Buren SPB (Maine / New Brunswick) Sault Ste Marie SPB & Sault Ste. Marie Water Aerodrome (Michigan / Ontario) Sand Point Lake Water Aerodrome (Minnesota / Ontario) International Falls SPB & Fort Frances Water Aerodrome (Minnesota / Ontario) Baudette International Airport[lower-alpha 2] & Rainy River Water Aerodrome (Minnesota / Ontario) Hyder Seaplane Base & Stewart Water Aerodrome (Alaska / British Columbia)[65]