Airports Serving Castlewood 8 of 8 Matching Airports Watertown Mncpl Watertown, SD14.2 miles Brookings, SD Mncpl Brookings, SD31.1 miles Mnpl-Ryan Fld Marshall, MN62.3 miles Howes Huron, SD63.8 miles Regl Joe Foss Field2801 Jaycee Lane Sioux Falls, SD 5710480.7 miles Mitchell Mitchell, SD82.8 miles Aberdeen Mncpl Aberdeen, SD84.3 miles Redwood Falls Mncpl Redwood Falls, MN96.5 miles