| South Portland to Rivalta di Torino | 3,689.58 mi (5,937.81 km) |
| South Portland to Rivarolo Canavese | 3,688.43 mi (5,935.95 km) |
| South Portland to Rivoli | 3,688.39 mi (5,935.89 km) |
| South Portland to Rocca di Papa | 4,028.71 mi (6,483.58 km) |
| South Portland to Rocca Priora | 4,030.27 mi (6,486.09 km) |
| South Portland to Roccapiemonte | 4,152.62 mi (6,682.99 km) |
| South Portland to Roccastrada | 3,916.33 mi (6,302.73 km) |
| South Portland to Romano di Lombardia | 3,768.92 mi (6,065.50 km) |
| South Portland to Rome | 4,013.86 mi (6,459.69 km) |
| South Portland to Roncade | 3,875.79 mi (6,237.48 km) |
| South Portland to Ronchi dei Legionari | 3,915.27 mi (6,301.02 km) |
| South Portland to Ronciglione | 3,987.67 mi (6,417.54 km) |
| South Portland to Rosa | 3,847.10 mi (6,191.30 km) |
| South Portland to Rosarno | 4,298.14 mi (6,917.19 km) |
| South Portland to Rosignano Marittimo | 3,872.17 mi (6,231.66 km) |
