| Arcos de Valdevez to Orangevale (California) | 5,454.88 mi (8,778.79 km) |
| Arcos de Valdevez to Orchards (Washington) | 5,157.47 mi (8,300.14 km) |
| Arcos de Valdevez to Orcutt (California) | 5,612.64 mi (9,032.67 km) |
| Arcos de Valdevez to Oregon (Ohio) | 3,733.29 mi (6,008.15 km) |
| Arcos de Valdevez to Oregon (Wisconsin) | 3,960.35 mi (6,373.57 km) |
| Arcos de Valdevez to Oregon City (Oregon) | 5,176.60 mi (8,330.93 km) |
| Arcos de Valdevez to Orem (Utah) | 5,008.17 mi (8,059.87 km) |
| Arcos de Valdevez to Orinda (California) | 5,531.10 mi (8,901.44 km) |
| Arcos de Valdevez to Orland Park (Illinois) | 3,936.39 mi (6,335.01 km) |
| Arcos de Valdevez to Orlando (Florida) | 4,097.72 mi (6,594.64 km) |
| Arcos de Valdevez to Ormond Beach (Florida) | 4,054.26 mi (6,524.70 km) |
| Arcos de Valdevez to Oro Valley (Arizona) | 5,336.41 mi (8,588.12 km) |
| Arcos de Valdevez to Oroville (California) | 5,427.63 mi (8,734.93 km) |
| Arcos de Valdevez to Oshkosh (Wisconsin) | 3,887.67 mi (6,256.60 km) |
| Arcos de Valdevez to Oskaloosa (Iowa) | 4,161.13 mi (6,696.69 km) |
