| Sintra to Oak Harbor (Washington) | 5,164.09 mi (8,310.80 km) |
| Sintra to Oak Hills (Oregon) | 5,299.75 mi (8,529.12 km) |
| Sintra to Oak Lawn (Illinois) | 3,987.05 mi (6,416.53 km) |
| Sintra to Oak Park (California) | 5,669.76 mi (9,124.59 km) |
| Sintra to Oak Park (Illinois) | 3,983.64 mi (6,411.04 km) |
| Sintra to Oak Park (Michigan) | 3,752.01 mi (6,038.28 km) |
| Sintra to Oak Ridge (Florida) | 4,099.28 mi (6,597.15 km) |
| Sintra to Oak Ridge (New Jersey) | 3,371.22 mi (5,425.46 km) |
| Sintra to Oak Ridge (Tennessee) | 3,996.53 mi (6,431.79 km) |
| Sintra to Oakdale (California) | 5,589.01 mi (8,994.63 km) |
| Sintra to Oakdale (Minnesota) | 4,124.33 mi (6,637.47 km) |
| Sintra to Oakland (California) | 5,642.29 mi (9,080.38 km) |
| Sintra to Oakland (New Jersey) | 3,358.69 mi (5,405.29 km) |
| Sintra to Oakland Park (Florida) | 4,114.22 mi (6,621.19 km) |
| Sintra to Oakleaf Plantation (Florida) | 4,062.27 mi (6,537.59 km) |
