| Risca to Oak Harbor (Washington) | 4,669.08 mi (7,514.15 km) |
| Risca to Oak Hills (Oregon) | 4,829.98 mi (7,773.10 km) |
| Risca to Oak Lawn (Illinois) | 3,843.03 mi (6,184.76 km) |
| Risca to Oak Park (California) | 5,349.27 mi (8,608.81 km) |
| Risca to Oak Park (Illinois) | 3,836.54 mi (6,174.31 km) |
| Risca to Oak Park (Michigan) | 3,631.22 mi (5,843.89 km) |
| Risca to Oak Ridge (Florida) | 4,217.80 mi (6,787.89 km) |
| Risca to Oak Ridge (New Jersey) | 3,344.17 mi (5,381.92 km) |
| Risca to Oak Ridge (Tennessee) | 3,973.47 mi (6,394.68 km) |
| Risca to Oakdale (California) | 5,212.68 mi (8,389.00 km) |
| Risca to Oakdale (Minnesota) | 3,888.88 mi (6,258.55 km) |
| Risca to Oakland (California) | 5,253.20 mi (8,454.21 km) |
| Risca to Oakland (New Jersey) | 3,333.69 mi (5,365.06 km) |
| Risca to Oakland Park (Florida) | 4,278.90 mi (6,886.22 km) |
| Risca to Oakleaf Plantation (Florida) | 4,151.52 mi (6,681.23 km) |
