| Mason City to Rhondda | 3,970.50 mi (6,389.90 km) |
| Mason City to Rhosllanerchrugog | 3,936.00 mi (6,334.38 km) |
| Mason City to Rhyl | 3,910.06 mi (6,292.64 km) |
| Mason City to Rhymney | 3,970.53 mi (6,389.95 km) |
| Mason City to Richmond | 4,090.96 mi (6,583.77 km) |
| Mason City to Rickmansworth | 4,078.29 mi (6,563.38 km) |
| Mason City to Ripley | 3,993.85 mi (6,427.48 km) |
| Mason City to Ripon | 3,951.94 mi (6,360.03 km) |
| Mason City to Risca | 3,982.89 mi (6,409.83 km) |
| Mason City to Rochdale | 3,947.40 mi (6,352.73 km) |
| Mason City to Rochester | 4,123.14 mi (6,635.56 km) |
| Mason City to Rock Ferry | 3,925.30 mi (6,317.16 km) |
| Mason City to Rogerstone | 3,984.87 mi (6,413.04 km) |
| Mason City to Romford | 4,104.05 mi (6,604.83 km) |
| Mason City to Romsey | 4,063.95 mi (6,540.30 km) |
