| Diamond Bar to Rivalta di Torino | 5,993.44 mi (9,645.51 km) |
| Diamond Bar to Rivarolo Canavese | 5,984.87 mi (9,631.71 km) |
| Diamond Bar to Rivoli | 5,991.60 mi (9,642.55 km) |
| Diamond Bar to Rocca di Papa | 6,334.75 mi (10,194.80 km) |
| Diamond Bar to Rocca Priora | 6,335.49 mi (10,195.98 km) |
| Diamond Bar to Roccapiemonte | 6,452.94 mi (10,385.00 km) |
| Diamond Bar to Roccastrada | 6,218.22 mi (10,007.25 km) |
| Diamond Bar to Romano di Lombardia | 6,041.06 mi (9,722.14 km) |
| Diamond Bar to Rome | 6,320.38 mi (10,171.67 km) |
| Diamond Bar to Roncade | 6,117.40 mi (9,845.01 km) |
| Diamond Bar to Ronchi dei Legionari | 6,140.22 mi (9,881.73 km) |
| Diamond Bar to Ronciglione | 6,290.49 mi (10,123.56 km) |
| Diamond Bar to Rosa | 6,093.75 mi (9,806.95 km) |
| Diamond Bar to Rosarno | 6,619.51 mi (10,653.07 km) |
| Diamond Bar to Rosignano Marittimo | 6,174.79 mi (9,937.36 km) |
