| Dumbarton to Rivalta di Torino | 919.67 mi (1,480.06 km) |
| Dumbarton to Rivarolo Canavese | 907.09 mi (1,459.82 km) |
| Dumbarton to Rivoli | 917.53 mi (1,476.62 km) |
| Dumbarton to Rocca di Papa | 1,248.75 mi (2,009.67 km) |
| Dumbarton to Rocca Priora | 1,249.17 mi (2,010.34 km) |
| Dumbarton to Roccapiemonte | 1,362.74 mi (2,193.12 km) |
| Dumbarton to Roccastrada | 1,133.87 mi (1,824.79 km) |
| Dumbarton to Romano di Lombardia | 951.03 mi (1,530.54 km) |
| Dumbarton to Rome | 1,234.93 mi (1,987.42 km) |
| Dumbarton to Roncade | 1,022.81 mi (1,646.05 km) |
| Dumbarton to Ronchi dei Legionari | 1,047.18 mi (1,685.27 km) |
| Dumbarton to Ronciglione | 1,204.45 mi (1,938.37 km) |
| Dumbarton to Rosa | 999.21 mi (1,608.07 km) |
| Dumbarton to Rosarno | 1,532.30 mi (2,466.00 km) |
| Dumbarton to Rosignano Marittimo | 1,092.18 mi (1,757.69 km) |
