| Arcos de Valdevez to Odessa (Texas) | 4,974.64 mi (8,005.90 km) |
| Arcos de Valdevez to Ogden (Utah) | 4,977.18 mi (8,009.99 km) |
| Arcos de Valdevez to Oildale (California) | 5,529.83 mi (8,899.40 km) |
| Arcos de Valdevez to Ojus (Florida) | 4,137.18 mi (6,658.14 km) |
| Arcos de Valdevez to Okemos (Michigan) | 3,744.86 mi (6,026.77 km) |
| Arcos de Valdevez to Oklahoma City (Oklahoma) | 4,603.59 mi (7,408.77 km) |
| Arcos de Valdevez to Okmulgee (Oklahoma) | 4,528.75 mi (7,288.31 km) |
| Arcos de Valdevez to Olathe (Kansas) | 4,347.56 mi (6,996.71 km) |
| Arcos de Valdevez to Old Jamestown (Missouri) | 4,143.36 mi (6,668.10 km) |
| Arcos de Valdevez to Oldsmar (Florida) | 4,181.33 mi (6,729.19 km) |
| Arcos de Valdevez to Olean (New York) | 3,489.16 mi (5,615.26 km) |
| Arcos de Valdevez to Olive Branch (Mississippi) | 4,266.69 mi (6,866.57 km) |
| Arcos de Valdevez to Olivehurst (California) | 5,448.16 mi (8,767.97 km) |
| Arcos de Valdevez to Olney (Maryland) | 3,512.79 mi (5,653.29 km) |
| Arcos de Valdevez to Olympia (Washington) | 5,103.51 mi (8,213.30 km) |
