| Sintra to River Ridge (Louisiana) | 4,500.34 mi (7,242.60 km) |
| Sintra to Riverbank (California) | 5,594.56 mi (9,003.57 km) |
| Sintra to Riverdale (Georgia) | 4,080.10 mi (6,566.28 km) |
| Sintra to Riverdale (Illinois) | 3,983.70 mi (6,411.15 km) |
| Sintra to Riverside (California) | 5,622.53 mi (9,048.59 km) |
| Sintra to Riverside (Ohio) | 3,871.84 mi (6,231.12 km) |
| Sintra to Riverton (Utah) | 5,102.79 mi (8,212.14 km) |
| Sintra to Riverton (Wyoming) | 4,852.14 mi (7,808.76 km) |
| Sintra to Riverview (Florida) | 4,168.59 mi (6,708.70 km) |
| Sintra to Riverview (Michigan) | 3,760.47 mi (6,051.89 km) |
| Sintra to Riviera Beach (Florida) | 4,088.44 mi (6,579.71 km) |
| Sintra to Riviera Beach (Maryland) | 3,517.85 mi (5,661.43 km) |
| Sintra to Roanoke (Virginia) | 3,740.69 mi (6,020.06 km) |
| Sintra to Roanoke Rapids (North Carolina) | 3,648.95 mi (5,872.42 km) |
| Sintra to Robbinsdale (Minnesota) | 4,139.31 mi (6,661.58 km) |
