| Ostend to Oak Harbor (Washington) | 4,845.84 mi (7,798.62 km) |
| Ostend to Oak Hills (Oregon) | 5,011.72 mi (8,065.58 km) |
| Ostend to Oak Lawn (Illinois) | 4,084.60 mi (6,573.53 km) |
| Ostend to Oak Park (California) | 5,558.49 mi (8,945.52 km) |
| Ostend to Oak Park (Illinois) | 4,077.81 mi (6,562.61 km) |
| Ostend to Oak Park (Michigan) | 3,876.07 mi (6,237.93 km) |
| Ostend to Oak Ridge (Florida) | 4,476.26 mi (7,203.84 km) |
| Ostend to Oak Ridge (New Jersey) | 3,597.54 mi (5,789.68 km) |
| Ostend to Oak Ridge (Tennessee) | 4,225.16 mi (6,799.73 km) |
| Ostend to Oakdale (California) | 5,412.18 mi (8,710.07 km) |
| Ostend to Oakdale (Minnesota) | 4,119.25 mi (6,629.29 km) |
| Ostend to Oakland (California) | 5,449.91 mi (8,770.78 km) |
| Ostend to Oakland (New Jersey) | 3,587.23 mi (5,773.08 km) |
| Ostend to Oakland Park (Florida) | 4,538.50 mi (7,304.01 km) |
| Ostend to Oakleaf Plantation (Florida) | 4,409.01 mi (7,095.62 km) |
