| Gravesend to Olympia Heights (Florida) | 4,458.40 mi (7,175.11 km) |
| Gravesend to Omaha (Nebraska) | 4,311.32 mi (6,938.40 km) |
| Gravesend to On Top of the World Designated Place (Florida) | 4,370.62 mi (7,033.83 km) |
| Gravesend to Onalaska (Wisconsin) | 4,008.20 mi (6,450.57 km) |
| Gravesend to Oneida (New York) | 3,448.50 mi (5,549.83 km) |
| Gravesend to Oneonta (New York) | 3,451.03 mi (5,553.89 km) |
| Gravesend to Ontario (California) | 5,439.72 mi (8,754.39 km) |
| Gravesend to Ontario (Oregon) | 4,855.17 mi (7,813.64 km) |
| Gravesend to Opa-locka (Florida) | 4,445.97 mi (7,155.10 km) |
| Gravesend to Opelika (Alabama) | 4,321.95 mi (6,955.51 km) |
| Gravesend to Opelousas (Louisiana) | 4,699.98 mi (7,563.88 km) |
| Gravesend to Orange (California) | 5,460.12 mi (8,787.22 km) |
| Gravesend to Orange (Texas) | 4,787.58 mi (7,704.87 km) |
| Gravesend to Orange City (Florida) | 4,337.34 mi (6,980.27 km) |
| Gravesend to Orangeburg (South Carolina) | 4,096.41 mi (6,592.53 km) |
