| Pembroke Dock to Orangevale (California) | 5,110.12 mi (8,223.94 km) |
| Pembroke Dock to Orchards (Washington) | 4,756.31 mi (7,654.54 km) |
| Pembroke Dock to Orcutt (California) | 5,300.24 mi (8,529.91 km) |
| Pembroke Dock to Oregon (Ohio) | 3,601.34 mi (5,795.80 km) |
| Pembroke Dock to Oregon (Wisconsin) | 3,776.93 mi (6,078.37 km) |
| Pembroke Dock to Oregon City (Oregon) | 4,777.47 mi (7,688.59 km) |
| Pembroke Dock to Orem (Utah) | 4,712.71 mi (7,584.37 km) |
| Pembroke Dock to Orinda (California) | 5,185.63 mi (8,345.46 km) |
| Pembroke Dock to Orland Park (Illinois) | 3,777.64 mi (6,079.53 km) |
| Pembroke Dock to Orlando (Florida) | 4,134.81 mi (6,654.33 km) |
| Pembroke Dock to Ormond Beach (Florida) | 4,084.27 mi (6,573.00 km) |
| Pembroke Dock to Oro Valley (Arizona) | 5,110.56 mi (8,224.65 km) |
| Pembroke Dock to Oroville (California) | 5,074.98 mi (8,167.39 km) |
| Pembroke Dock to Oshkosh (Wisconsin) | 3,696.19 mi (5,948.44 km) |
| Pembroke Dock to Oskaloosa (Iowa) | 3,976.33 mi (6,399.29 km) |
