| Ontario to Baraboo (Wisconsin) | 1,626.90 mi (2,618.24 km) |
| Ontario to Barberton (Ohio) | 2,015.51 mi (3,243.65 km) |
| Ontario to Bardstown (Kentucky) | 1,808.63 mi (2,910.70 km) |
| Ontario to Barrington (Illinois) | 1,688.00 mi (2,716.57 km) |
| Ontario to Barstow (California) | 65.41 mi (105.27 km) |
| Ontario to Bartlesville (Oklahoma) | 1,231.56 mi (1,982.00 km) |
| Ontario to Bartlett (Illinois) | 1,682.05 mi (2,707.00 km) |
| Ontario to Bartlett (Tennessee) | 1,576.65 mi (2,537.37 km) |
| Ontario to Bartow (Florida) | 2,151.07 mi (3,461.82 km) |
| Ontario to Batavia (Illinois) | 1,675.32 mi (2,696.16 km) |
| Ontario to Batavia (New York) | 2,197.20 mi (3,536.06 km) |
| Ontario to Batesville (Arkansas) | 1,472.88 mi (2,370.37 km) |
| Ontario to Baton Rouge (Louisiana) | 1,562.58 mi (2,514.73 km) |
| Ontario to Battle Creek (Michigan) | 1,836.17 mi (2,955.03 km) |
| Ontario to Battle Ground (Washington) | 851.66 mi (1,370.61 km) |
