| Sintra to Roy (Utah) | 5,078.75 mi (8,173.46 km) |
| Sintra to Royal Kunia (Hawaii) | 7,808.40 mi (12,566.41 km) |
| Sintra to Royal Oak (Michigan) | 3,749.51 mi (6,034.25 km) |
| Sintra to Royal Palm Beach (Florida) | 4,099.13 mi (6,596.91 km) |
| Sintra to Royse City (Texas) | 4,692.08 mi (7,551.18 km) |
| Sintra to Ruskin (Florida) | 4,178.95 mi (6,725.36 km) |
| Sintra to Russellville (Alabama) | 4,214.94 mi (6,783.29 km) |
| Sintra to Russellville (Arkansas) | 4,453.78 mi (7,167.67 km) |
| Sintra to Ruston (Louisiana) | 4,527.66 mi (7,286.57 km) |
| Sintra to Rutherford (New Jersey) | 3,357.03 mi (5,402.62 km) |
| Sintra to Rutland (Vermont) | 3,241.00 mi (5,215.89 km) |
| Sintra to Sabana Grande (Puerto Rico) | 3,711.74 mi (5,973.47 km) |
| Sintra to Sachse (Texas) | 4,704.96 mi (7,571.90 km) |
| Sintra to Saco (Maine) | 3,121.63 mi (5,023.78 km) |
| Sintra to Sacramento (California) | 5,575.90 mi (8,973.55 km) |
