| Montemor-o-Novo to Odessa (Texas) | 5,086.19 mi (8,185.43 km) |
| Montemor-o-Novo to Ogden (Utah) | 5,127.89 mi (8,252.54 km) |
| Montemor-o-Novo to Oildale (California) | 5,678.59 mi (9,138.81 km) |
| Montemor-o-Novo to Ojus (Florida) | 4,186.59 mi (6,737.66 km) |
| Montemor-o-Novo to Okemos (Michigan) | 3,862.87 mi (6,216.69 km) |
| Montemor-o-Novo to Oklahoma City (Oklahoma) | 4,717.13 mi (7,591.49 km) |
| Montemor-o-Novo to Okmulgee (Oklahoma) | 4,640.25 mi (7,467.76 km) |
| Montemor-o-Novo to Olathe (Kansas) | 4,467.18 mi (7,189.23 km) |
| Montemor-o-Novo to Old Jamestown (Missouri) | 4,256.11 mi (6,849.55 km) |
| Montemor-o-Novo to Oldsmar (Florida) | 4,243.49 mi (6,829.23 km) |
| Montemor-o-Novo to Olean (New York) | 3,597.32 mi (5,789.32 km) |
| Montemor-o-Novo to Olive Branch (Mississippi) | 4,365.93 mi (7,026.28 km) |
| Montemor-o-Novo to Olivehurst (California) | 5,608.17 mi (9,025.49 km) |
| Montemor-o-Novo to Olney (Maryland) | 3,607.33 mi (5,805.44 km) |
| Montemor-o-Novo to Olympia (Washington) | 5,279.84 mi (8,497.09 km) |
