| Sintra to Myrtle Grove (North Carolina) | 3,729.95 mi (6,002.77 km) |
| Sintra to Nacogdoches (Texas) | 4,661.40 mi (7,501.80 km) |
| Sintra to Nampa (Idaho) | 5,155.48 mi (8,296.95 km) |
| Sintra to Nanakuli (Hawaii) | 7,812.59 mi (12,573.15 km) |
| Sintra to Nanticoke (Pennsylvania) | 3,440.61 mi (5,537.12 km) |
| Sintra to Nanuet (New York) | 3,346.14 mi (5,385.09 km) |
| Sintra to Napa (California) | 5,621.53 mi (9,046.98 km) |
| Sintra to Naperville (Illinois) | 4,005.25 mi (6,445.83 km) |
| Sintra to Naples (Florida) | 4,201.93 mi (6,762.36 km) |
| Sintra to Naranja (Florida) | 4,152.43 mi (6,682.68 km) |
| Sintra to Nashua (New Hampshire) | 3,186.88 mi (5,128.78 km) |
| Sintra to Nashville (Tennessee) | 4,113.05 mi (6,619.32 km) |
| Sintra to Natchez (Mississippi) | 4,501.37 mi (7,244.26 km) |
| Sintra to Natchitoches (Louisiana) | 4,579.87 mi (7,370.60 km) |
| Sintra to National City (California) | 5,667.89 mi (9,121.59 km) |
