| Marinette to Olympia Heights (Florida) | 1,398.03 mi (2,249.92 km) |
| Marinette to Omaha (Nebraska) | 499.40 mi (803.70 km) |
| Marinette to On Top of the World Designated Place (Florida) | 1,142.16 mi (1,838.13 km) |
| Marinette to Onalaska (Wisconsin) | 194.64 mi (313.24 km) |
| Marinette to Oneida (New York) | 609.57 mi (981.01 km) |
| Marinette to Oneonta (New York) | 652.07 mi (1,049.40 km) |
| Marinette to Ontario (California) | 1,756.00 mi (2,826.00 km) |
| Marinette to Ontario (Oregon) | 1,438.54 mi (2,315.11 km) |
| Marinette to Opa-locka (Florida) | 1,387.68 mi (2,233.25 km) |
| Marinette to Opelika (Alabama) | 866.99 mi (1,395.28 km) |
| Marinette to Opelousas (Louisiana) | 1,034.58 mi (1,664.99 km) |
| Marinette to Orange (California) | 1,775.43 mi (2,857.28 km) |
| Marinette to Orange (Texas) | 1,086.14 mi (1,747.98 km) |
| Marinette to Orange City (Florida) | 1,168.68 mi (1,880.80 km) |
| Marinette to Orangeburg (South Carolina) | 878.21 mi (1,413.35 km) |
