| Sintra to Punta Gorda (Florida) | 4,188.64 mi (6,740.96 km) |
| Sintra to Puyallup (Washington) | 5,203.98 mi (8,375.00 km) |
| Sintra to Queen Creek (Arizona) | 5,399.23 mi (8,689.22 km) |
| Sintra to Queens (New York) | 3,343.55 mi (5,380.92 km) |
| Sintra to Quincy (Illinois) | 4,211.72 mi (6,778.11 km) |
| Sintra to Quincy (Massachusetts) | 3,174.13 mi (5,108.27 km) |
| Sintra to Raceland (Louisiana) | 4,529.95 mi (7,290.24 km) |
| Sintra to Racine (Wisconsin) | 3,960.08 mi (6,373.13 km) |
| Sintra to Radcliff (Kentucky) | 4,019.01 mi (6,467.97 km) |
| Sintra to Radford (Virginia) | 3,775.18 mi (6,075.57 km) |
| Sintra to Rahway (New Jersey) | 3,370.70 mi (5,424.61 km) |
| Sintra to Raleigh (North Carolina) | 3,717.12 mi (5,982.12 km) |
| Sintra to Ramona (California) | 5,640.79 mi (9,077.98 km) |
| Sintra to Ramsey (Minnesota) | 4,137.16 mi (6,658.11 km) |
| Sintra to Ramsey (New Jersey) | 3,353.35 mi (5,396.70 km) |
