| Sintra to Joliet (Illinois) | 4,011.37 mi (6,455.67 km) |
| Sintra to Jonesboro (Arkansas) | 4,315.40 mi (6,944.97 km) |
| Sintra to Joplin (Missouri) | 4,455.60 mi (7,170.60 km) |
| Sintra to Joppatowne (Maryland) | 3,502.56 mi (5,636.82 km) |
| Sintra to Juana Díaz (Puerto Rico) | 3,688.29 mi (5,935.73 km) |
| Sintra to Junction City (Kansas) | 4,496.53 mi (7,236.46 km) |
| Sintra to Juneau (Alaska) | 5,006.45 mi (8,057.10 km) |
| Sintra to Jupiter (Florida) | 4,085.54 mi (6,575.04 km) |
| Sintra to Jupiter Farms (Florida) | 4,091.06 mi (6,583.93 km) |
| Sintra to Jurupa Valley (California) | 5,622.91 mi (9,049.19 km) |
| Sintra to Justice (Illinois) | 3,989.79 mi (6,420.95 km) |
| Sintra to Kahului (Hawaii) | 7,795.74 mi (12,546.04 km) |
| Sintra to Kailua (Hawaii) | 7,800.91 mi (12,554.36 km) |
| Sintra to Kalamazoo (Michigan) | 3,869.88 mi (6,227.97 km) |
| Sintra to Kalispell (Montana) | 4,873.00 mi (7,842.34 km) |
