| Mortara to Odessa (Texas) | 5,582.59 mi (8,984.31 km) |
| Mortara to Ogden (Utah) | 5,431.04 mi (8,740.41 km) |
| Mortara to Oildale (California) | 5,979.74 mi (9,623.46 km) |
| Mortara to Ojus (Florida) | 4,916.90 mi (7,912.99 km) |
| Mortara to Okemos (Michigan) | 4,356.74 mi (7,011.49 km) |
| Mortara to Oklahoma City (Oklahoma) | 5,211.96 mi (8,387.84 km) |
| Mortara to Okmulgee (Oklahoma) | 5,145.28 mi (8,280.53 km) |
| Mortara to Olathe (Kansas) | 4,940.51 mi (7,950.98 km) |
| Mortara to Old Jamestown (Missouri) | 4,763.59 mi (7,666.26 km) |
| Mortara to Oldsmar (Florida) | 4,934.88 mi (7,941.93 km) |
| Mortara to Olean (New York) | 4,138.06 mi (6,659.56 km) |
| Mortara to Olive Branch (Mississippi) | 4,925.98 mi (7,927.59 km) |
| Mortara to Olivehurst (California) | 5,845.02 mi (9,406.66 km) |
| Mortara to Olney (Maryland) | 4,199.66 mi (6,758.70 km) |
| Mortara to Olympia (Washington) | 5,417.49 mi (8,718.61 km) |
