| Diamond Bar to Rende | 6,579.20 mi (10,588.20 km) |
| Diamond Bar to Resana | 6,103.84 mi (9,823.18 km) |
| Diamond Bar to Rescaldina | 6,010.28 mi (9,672.61 km) |
| Diamond Bar to Rezzato | 6,059.15 mi (9,751.26 km) |
| Diamond Bar to Rho | 6,017.26 mi (9,683.85 km) |
| Diamond Bar to Ribera | 6,582.36 mi (10,593.29 km) |
| Diamond Bar to Riccione Marina | 6,212.85 mi (9,998.62 km) |
| Diamond Bar to Riesi | 6,622.06 mi (10,657.17 km) |
| Diamond Bar to Rieti | 6,305.04 mi (10,146.99 km) |
| Diamond Bar to Rignano Flaminio | 6,303.97 mi (10,145.26 km) |
| Diamond Bar to Rignano sull'Arno | 6,189.56 mi (9,961.14 km) |
| Diamond Bar to Rimini | 6,207.11 mi (9,989.38 km) |
| Diamond Bar to Rionero in Vulture | 6,475.35 mi (10,421.06 km) |
| Diamond Bar to Riposto | 6,635.18 mi (10,678.28 km) |
| Diamond Bar to Riva del Garda | 6,056.53 mi (9,747.04 km) |
