| Alenquer to Olympia Heights (Florida) | 4,157.03 mi (6,690.09 km) |
| Alenquer to Omaha (Nebraska) | 4,389.74 mi (7,064.60 km) |
| Alenquer to On Top of the World Designated Place (Florida) | 4,137.50 mi (6,658.66 km) |
| Alenquer to Onalaska (Wisconsin) | 4,086.85 mi (6,577.15 km) |
| Alenquer to Oneida (New York) | 3,390.36 mi (5,456.25 km) |
| Alenquer to Oneonta (New York) | 3,376.16 mi (5,433.40 km) |
| Alenquer to Ontario (California) | 5,632.35 mi (9,064.39 km) |
| Alenquer to Ontario (Oregon) | 5,153.92 mi (8,294.44 km) |
| Alenquer to Opa-locka (Florida) | 4,146.19 mi (6,672.64 km) |
| Alenquer to Opelika (Alabama) | 4,172.20 mi (6,714.51 km) |
| Alenquer to Opelousas (Louisiana) | 4,586.01 mi (7,380.48 km) |
| Alenquer to Orange (California) | 5,652.41 mi (9,096.68 km) |
| Alenquer to Orange (Texas) | 4,685.13 mi (7,539.99 km) |
| Alenquer to Orange City (Florida) | 4,091.61 mi (6,584.82 km) |
| Alenquer to Orangeburg (South Carolina) | 3,915.83 mi (6,301.92 km) |
