| Albergaria-a-Velha to Olympia Heights (Florida) | 4,165.30 mi (6,703.40 km) |
| Albergaria-a-Velha to Omaha (Nebraska) | 4,352.16 mi (7,004.12 km) |
| Albergaria-a-Velha to On Top of the World Designated Place (Florida) | 4,136.86 mi (6,657.64 km) |
| Albergaria-a-Velha to Onalaska (Wisconsin) | 4,048.03 mi (6,514.68 km) |
| Albergaria-a-Velha to Oneida (New York) | 3,364.37 mi (5,414.44 km) |
| Albergaria-a-Velha to Oneonta (New York) | 3,352.13 mi (5,394.73 km) |
| Albergaria-a-Velha to Ontario (California) | 5,585.80 mi (8,989.48 km) |
| Albergaria-a-Velha to Ontario (Oregon) | 5,094.12 mi (8,198.20 km) |
| Albergaria-a-Velha to Opa-locka (Florida) | 4,154.21 mi (6,685.55 km) |
| Albergaria-a-Velha to Opelika (Alabama) | 4,161.18 mi (6,696.77 km) |
| Albergaria-a-Velha to Opelousas (Louisiana) | 4,572.18 mi (7,358.21 km) |
| Albergaria-a-Velha to Orange (California) | 5,605.97 mi (9,021.93 km) |
| Albergaria-a-Velha to Orange (Texas) | 4,670.25 mi (7,516.04 km) |
| Albergaria-a-Velha to Orange City (Florida) | 4,092.41 mi (6,586.09 km) |
| Albergaria-a-Velha to Orangeburg (South Carolina) | 3,907.57 mi (6,288.63 km) |
