| Idrija to Bonita (California) | 6,201.83 mi (9,980.89 km) |
| Idrija to Bonita Springs (Florida) | 5,192.25 mi (8,356.13 km) |
| Idrija to Bonney Lake (Washington) | 5,474.19 mi (8,809.86 km) |
| Idrija to Boone (Iowa) | 4,915.19 mi (7,910.24 km) |
| Idrija to Boone (North Carolina) | 4,720.69 mi (7,597.22 km) |
| Idrija to Borger (Texas) | 5,513.85 mi (8,873.68 km) |
| Idrija to Bossier City (Louisiana) | 5,385.93 mi (8,667.82 km) |
| Idrija to Boston (Massachusetts) | 4,016.00 mi (6,463.13 km) |
| Idrija to Bostonia (California) | 6,190.30 mi (9,962.32 km) |
| Idrija to Bothell (Washington) | 5,439.17 mi (8,753.50 km) |
| Idrija to Bothell East (Washington) | 5,436.73 mi (8,749.58 km) |
| Idrija to Bothell West (Washington) | 5,438.05 mi (8,751.69 km) |
| Idrija to Boulder (Colorado) | 5,411.21 mi (8,708.50 km) |
| Idrija to Boulder City (Nevada) | 5,952.15 mi (9,579.06 km) |
| Idrija to Bound Brook (New Jersey) | 4,231.71 mi (6,810.28 km) |
