| University of California-Santa Barbara to Smolyan | 6,724.92 mi (10,822.71 km) |
| University of California-Santa Barbara to Sofia | 6,623.28 mi (10,659.14 km) |
| University of California-Santa Barbara to Sopot | 6,661.56 mi (10,720.74 km) |
| University of California-Santa Barbara to Sozopol | 6,745.49 mi (10,855.82 km) |
| University of California-Santa Barbara to Sredets | 6,738.14 mi (10,843.99 km) |
| University of California-Santa Barbara to Stamboliyski | 6,687.50 mi (10,762.49 km) |
| University of California-Santa Barbara to Stara Zagora | 6,696.53 mi (10,777.02 km) |
| University of California-Santa Barbara to Svilengrad | 6,750.42 mi (10,863.75 km) |
| University of California-Santa Barbara to Svishtov | 6,617.29 mi (10,649.49 km) |
| University of California-Santa Barbara to Targovishte | 6,668.54 mi (10,731.98 km) |
| University of California-Santa Barbara to Teteven | 6,633.58 mi (10,675.72 km) |
| University of California-Santa Barbara to Troyan | 6,646.61 mi (10,696.69 km) |
| University of California-Santa Barbara to Tryavna | 6,666.51 mi (10,728.71 km) |
| University of California-Santa Barbara to Tutrakan | 6,620.19 mi (10,654.16 km) |
| University of California-Santa Barbara to Varna | 6,700.88 mi (10,784.02 km) |
