| Assen to Olympia Heights (Florida) | 4,692.80 mi (7,552.33 km) |
| Assen to Omaha (Nebraska) | 4,468.07 mi (7,190.67 km) |
| Assen to On Top of the World Designated Place (Florida) | 4,593.63 mi (7,392.73 km) |
| Assen to Onalaska (Wisconsin) | 4,168.47 mi (6,708.50 km) |
| Assen to Oneida (New York) | 3,646.68 mi (5,868.76 km) |
| Assen to Oneonta (New York) | 3,652.60 mi (5,878.30 km) |
| Assen to Ontario (California) | 5,554.45 mi (8,939.03 km) |
| Assen to Ontario (Oregon) | 4,945.89 mi (7,959.64 km) |
| Assen to Opa-locka (Florida) | 4,680.18 mi (7,532.03 km) |
| Assen to Opelika (Alabama) | 4,529.43 mi (7,289.41 km) |
| Assen to Opelousas (Louisiana) | 4,896.74 mi (7,880.55 km) |
| Assen to Orange (California) | 5,574.73 mi (8,971.66 km) |
| Assen to Orange (Texas) | 4,981.12 mi (8,016.34 km) |
| Assen to Orange City (Florida) | 4,562.89 mi (7,343.26 km) |
| Assen to Orangeburg (South Carolina) | 4,311.92 mi (6,939.37 km) |
