| Boulder City to Zottegem | 5,387.74 mi (8,670.72 km) |
| Boulder City to Zulte | 5,373.73 mi (8,648.18 km) |
| Boulder City to Zwevegem | 5,376.05 mi (8,651.92 km) |
| Boulder City to Zwijndrecht | 5,387.88 mi (8,670.95 km) |
| Boulder City to Asenovgrad | 6,487.94 mi (10,441.33 km) |
| Boulder City to Aytos | 6,509.63 mi (10,476.24 km) |
| Boulder City to Balchik | 6,488.64 mi (10,442.46 km) |
| Boulder City to Bankya | 6,400.80 mi (10,301.09 km) |
| Boulder City to Bansko | 6,460.70 mi (10,397.49 km) |
| Boulder City to Berkovitsa | 6,369.39 mi (10,250.53 km) |
| Boulder City to Blagoevgrad | 6,439.52 mi (10,363.41 km) |
| Boulder City to Botevgrad | 6,406.77 mi (10,310.71 km) |
| Boulder City to Burgas | 6,527.01 mi (10,504.20 km) |
| Boulder City to Byala Slatina | 6,377.87 mi (10,264.19 km) |
| Boulder City to Chirpan | 6,489.40 mi (10,443.68 km) |
