| Sintra to Bonita (California) | 5,664.91 mi (9,116.79 km) |
| Sintra to Bonita Springs (Florida) | 4,194.08 mi (6,749.72 km) |
| Sintra to Bonney Lake (Washington) | 5,199.80 mi (8,368.27 km) |
| Sintra to Boone (Iowa) | 4,257.69 mi (6,852.09 km) |
| Sintra to Boone (North Carolina) | 3,857.86 mi (6,208.62 km) |
| Sintra to Borger (Texas) | 4,832.22 mi (7,776.70 km) |
| Sintra to Bossier City (Louisiana) | 4,578.99 mi (7,369.17 km) |
| Sintra to Boston (Massachusetts) | 3,175.97 mi (5,111.22 km) |
| Sintra to Bostonia (California) | 5,654.33 mi (9,099.76 km) |
| Sintra to Bothell (Washington) | 5,173.53 mi (8,326.00 km) |
| Sintra to Bothell East (Washington) | 5,171.33 mi (8,322.44 km) |
| Sintra to Bothell West (Washington) | 5,173.29 mi (8,325.60 km) |
| Sintra to Boulder (Colorado) | 4,836.62 mi (7,783.78 km) |
| Sintra to Boulder City (Nevada) | 5,430.73 mi (8,739.91 km) |
| Sintra to Bound Brook (New Jersey) | 3,384.33 mi (5,446.56 km) |
