| Ostend to Odessa (Texas) | 5,128.91 mi (8,254.19 km) |
| Ostend to Ogden (Utah) | 4,947.30 mi (7,961.90 km) |
| Ostend to Oildale (California) | 5,494.23 mi (8,842.11 km) |
| Ostend to Ojus (Florida) | 4,550.04 mi (7,322.58 km) |
| Ostend to Okemos (Michigan) | 3,912.11 mi (6,295.94 km) |
| Ostend to Oklahoma City (Oklahoma) | 4,760.49 mi (7,661.27 km) |
| Ostend to Okmulgee (Oklahoma) | 4,696.72 mi (7,558.64 km) |
| Ostend to Olathe (Kansas) | 4,486.14 mi (7,219.74 km) |
| Ostend to Old Jamestown (Missouri) | 4,318.70 mi (6,950.27 km) |
| Ostend to Oldsmar (Florida) | 4,549.81 mi (7,322.21 km) |
| Ostend to Olean (New York) | 3,708.47 mi (5,968.21 km) |
| Ostend to Olive Branch (Mississippi) | 4,493.91 mi (7,232.25 km) |
| Ostend to Olivehurst (California) | 5,355.36 mi (8,618.62 km) |
| Ostend to Olney (Maryland) | 3,785.54 mi (6,092.24 km) |
| Ostend to Olympia (Washington) | 4,925.45 mi (7,926.74 km) |
