| Idrija to Blue Springs (Missouri) | 5,081.03 mi (8,177.13 km) |
| Idrija to Bluffdale (Utah) | 5,595.81 mi (9,005.59 km) |
| Idrija to Bluffton (Indiana) | 4,652.34 mi (7,487.22 km) |
| Idrija to Bluffton (South Carolina) | 4,875.83 mi (7,846.89 km) |
| Idrija to Blythe (California) | 6,071.55 mi (9,771.22 km) |
| Idrija to Blytheville (Arkansas) | 5,067.19 mi (8,154.86 km) |
| Idrija to Boca Raton (Florida) | 5,116.77 mi (8,234.64 km) |
| Idrija to Boerne (Texas) | 5,725.68 mi (9,214.59 km) |
| Idrija to Bogalusa (Louisiana) | 5,320.49 mi (8,562.49 km) |
| Idrija to Boiling Springs (South Carolina) | 4,787.73 mi (7,705.10 km) |
| Idrija to Boise (Idaho) | 5,538.01 mi (8,912.57 km) |
| Idrija to Bolingbrook (Illinois) | 4,720.30 mi (7,596.58 km) |
| Idrija to Bolivar (Missouri) | 5,119.63 mi (8,239.25 km) |
| Idrija to Bon Air (Virginia) | 4,490.54 mi (7,226.82 km) |
| Idrija to Bonham (Texas) | 5,429.37 mi (8,737.73 km) |
