| Damme to Olympia Heights (Florida) | 4,767.17 mi (7,672.01 km) |
| Damme to Omaha (Nebraska) | 4,542.65 mi (7,310.68 km) |
| Damme to On Top of the World Designated Place (Florida) | 4,668.82 mi (7,513.74 km) |
| Damme to Onalaska (Wisconsin) | 4,243.28 mi (6,828.90 km) |
| Damme to Oneida (New York) | 3,722.51 mi (5,990.80 km) |
| Damme to Oneonta (New York) | 3,728.42 mi (6,000.31 km) |
| Damme to Ontario (California) | 5,625.41 mi (9,053.22 km) |
| Damme to Ontario (Oregon) | 5,014.33 mi (8,069.78 km) |
| Damme to Opa-locka (Florida) | 4,754.57 mi (7,651.74 km) |
| Damme to Opelika (Alabama) | 4,605.18 mi (7,411.31 km) |
| Damme to Opelousas (Louisiana) | 4,972.58 mi (8,002.59 km) |
| Damme to Orange (California) | 5,645.67 mi (9,085.82 km) |
| Damme to Orange (Texas) | 5,056.94 mi (8,138.36 km) |
| Damme to Orange City (Florida) | 4,637.93 mi (7,464.02 km) |
| Damme to Orangeburg (South Carolina) | 4,387.44 mi (7,060.90 km) |
