| Estoril to Oak Harbor (Washington) | 5,168.83 mi (8,318.42 km) |
| Estoril to Oak Hills (Oregon) | 5,304.32 mi (8,536.48 km) |
| Estoril to Oak Lawn (Illinois) | 3,989.88 mi (6,421.08 km) |
| Estoril to Oak Park (California) | 5,673.38 mi (9,130.42 km) |
| Estoril to Oak Park (Illinois) | 3,986.49 mi (6,415.63 km) |
| Estoril to Oak Park (Michigan) | 3,754.76 mi (6,042.70 km) |
| Estoril to Oak Ridge (Florida) | 4,100.30 mi (6,598.79 km) |
| Estoril to Oak Ridge (New Jersey) | 3,373.47 mi (5,429.07 km) |
| Estoril to Oak Ridge (Tennessee) | 3,998.56 mi (6,435.06 km) |
| Estoril to Oakdale (California) | 5,592.98 mi (9,001.03 km) |
| Estoril to Oakdale (Minnesota) | 4,127.71 mi (6,642.90 km) |
| Estoril to Oakland (California) | 5,646.33 mi (9,086.90 km) |
| Estoril to Oakland (New Jersey) | 3,360.92 mi (5,408.88 km) |
| Estoril to Oakland Park (Florida) | 4,114.90 mi (6,622.29 km) |
| Estoril to Oakleaf Plantation (Florida) | 4,063.50 mi (6,539.58 km) |
