| Martinengo to Olympia Heights (Florida) | 4,975.70 mi (8,007.61 km) |
| Martinengo to Omaha (Nebraska) | 4,897.49 mi (7,881.76 km) |
| Martinengo to On Top of the World Designated Place (Florida) | 4,906.17 mi (7,895.71 km) |
| Martinengo to Onalaska (Wisconsin) | 4,593.56 mi (7,392.63 km) |
| Martinengo to Oneida (New York) | 4,014.18 mi (6,460.20 km) |
| Martinengo to Oneonta (New York) | 4,013.85 mi (6,459.67 km) |
| Martinengo to Ontario (California) | 6,029.84 mi (9,704.08 km) |
| Martinengo to Ontario (Oregon) | 5,440.73 mi (8,756.02 km) |
| Martinengo to Opa-locka (Florida) | 4,963.65 mi (7,988.23 km) |
| Martinengo to Opelika (Alabama) | 4,876.39 mi (7,847.79 km) |
| Martinengo to Opelousas (Louisiana) | 5,263.45 mi (8,470.71 km) |
| Martinengo to Orange (California) | 6,050.23 mi (9,736.90 km) |
| Martinengo to Orange (Texas) | 5,353.52 mi (8,615.65 km) |
| Martinengo to Orange City (Florida) | 4,869.38 mi (7,836.51 km) |
| Martinengo to Orangeburg (South Carolina) | 4,642.69 mi (7,471.68 km) |
