| Isla Vista to Popovo | 6,654.55 mi (10,709.46 km) |
| Isla Vista to Provadia | 6,692.33 mi (10,770.26 km) |
| Isla Vista to Radnevo | 6,711.70 mi (10,801.43 km) |
| Isla Vista to Radomir | 6,622.88 mi (10,658.49 km) |
| Isla Vista to Rakitovo | 6,685.59 mi (10,759.41 km) |
| Isla Vista to Rakovski | 6,689.01 mi (10,764.92 km) |
| Isla Vista to Razgrad | 6,649.87 mi (10,701.93 km) |
| Isla Vista to Razlog | 6,675.99 mi (10,743.97 km) |
| Isla Vista to Ruse | 6,619.11 mi (10,652.42 km) |
| Isla Vista to Samokov | 6,651.01 mi (10,703.76 km) |
| Isla Vista to Sandanski | 6,690.16 mi (10,766.77 km) |
| Isla Vista to Sevlievo | 6,647.84 mi (10,698.66 km) |
| Isla Vista to Shumen | 6,674.79 mi (10,742.04 km) |
| Isla Vista to Silistra | 6,630.81 mi (10,671.26 km) |
| Isla Vista to Sliven | 6,697.72 mi (10,778.94 km) |
