| Idrija to Buenaventura Lakes (Florida) | 5,078.05 mi (8,172.33 km) |
| Idrija to Buffalo (Minnesota) | 4,761.22 mi (7,662.44 km) |
| Idrija to Buffalo (New York) | 4,307.50 mi (6,932.24 km) |
| Idrija to Buffalo Grove (Illinois) | 4,692.53 mi (7,551.90 km) |
| Idrija to Buford (Georgia) | 4,915.13 mi (7,910.14 km) |
| Idrija to Bull Run (Virginia) | 4,432.68 mi (7,133.70 km) |
| Idrija to Bullhead City (Arizona) | 5,982.36 mi (9,627.67 km) |
| Idrija to Burbank (California) | 6,150.57 mi (9,898.39 km) |
| Idrija to Burbank (Illinois) | 4,705.15 mi (7,572.21 km) |
| Idrija to Burien (Washington) | 5,460.16 mi (8,787.28 km) |
| Idrija to Burkburnett (Texas) | 5,493.94 mi (8,841.64 km) |
| Idrija to Burke (Virginia) | 4,422.11 mi (7,116.70 km) |
| Idrija to Burke Centre (Virginia) | 4,423.06 mi (7,118.24 km) |
| Idrija to Burleson (Texas) | 5,528.70 mi (8,897.59 km) |
| Idrija to Burley (Idaho) | 5,532.04 mi (8,902.96 km) |
