| Diamond Bar to Oak Harbor (Washington) | 1,018.60 mi (1,639.28 km) |
| Diamond Bar to Oak Hills (Oregon) | 840.44 mi (1,352.57 km) |
| Diamond Bar to Oak Lawn (Illinois) | 1,714.30 mi (2,758.89 km) |
| Diamond Bar to Oak Park (California) | 55.90 mi (89.96 km) |
| Diamond Bar to Oak Park (Illinois) | 1,714.16 mi (2,758.67 km) |
| Diamond Bar to Oak Park (Michigan) | 1,953.20 mi (3,143.37 km) |
| Diamond Bar to Oak Ridge (Florida) | 2,172.42 mi (3,496.17 km) |
| Diamond Bar to Oak Ridge (New Jersey) | 2,397.93 mi (3,859.10 km) |
| Diamond Bar to Oak Ridge (Tennessee) | 1,893.27 mi (3,046.92 km) |
| Diamond Bar to Oakdale (California) | 310.39 mi (499.52 km) |
| Diamond Bar to Oakdale (Minnesota) | 1,518.11 mi (2,443.16 km) |
| Diamond Bar to Oakland (California) | 359.47 mi (578.50 km) |
| Diamond Bar to Oakland (New Jersey) | 2,411.28 mi (3,880.58 km) |
| Diamond Bar to Oakland Park (Florida) | 2,301.89 mi (3,704.53 km) |
| Diamond Bar to Oakleaf Plantation (Florida) | 2,112.18 mi (3,399.23 km) |
