| Round Rock to Zottegem | 5,070.37 mi (8,159.97 km) |
| Round Rock to Zulte | 5,054.65 mi (8,134.67 km) |
| Round Rock to Zwevegem | 5,054.57 mi (8,134.55 km) |
| Round Rock to Zwijndrecht | 5,079.26 mi (8,174.28 km) |
| Round Rock to Asenovgrad | 6,234.85 mi (10,034.02 km) |
| Round Rock to Aytos | 6,289.09 mi (10,121.32 km) |
| Round Rock to Balchik | 6,285.68 mi (10,115.83 km) |
| Round Rock to Bankya | 6,137.86 mi (9,877.93 km) |
| Round Rock to Bansko | 6,191.41 mi (9,964.11 km) |
| Round Rock to Berkovitsa | 6,112.46 mi (9,837.05 km) |
| Round Rock to Blagoevgrad | 6,168.18 mi (9,926.72 km) |
| Round Rock to Botevgrad | 6,152.87 mi (9,902.09 km) |
| Round Rock to Burgas | 6,306.64 mi (10,149.56 km) |
| Round Rock to Byala Slatina | 6,131.80 mi (9,868.18 km) |
| Round Rock to Chirpan | 6,243.12 mi (10,047.33 km) |
