| Sunnyvale to Popovo | 6,514.01 mi (10,483.29 km) |
| Sunnyvale to Provadia | 6,549.39 mi (10,540.23 km) |
| Sunnyvale to Radnevo | 6,573.41 mi (10,578.88 km) |
| Sunnyvale to Radomir | 6,490.91 mi (10,446.11 km) |
| Sunnyvale to Rakitovo | 6,551.99 mi (10,544.40 km) |
| Sunnyvale to Rakovski | 6,552.92 mi (10,545.91 km) |
| Sunnyvale to Razgrad | 6,508.44 mi (10,474.32 km) |
| Sunnyvale to Razlog | 6,543.96 mi (10,531.49 km) |
| Sunnyvale to Ruse | 6,478.48 mi (10,426.10 km) |
| Sunnyvale to Samokov | 6,518.03 mi (10,489.75 km) |
| Sunnyvale to Sandanski | 6,559.07 mi (10,555.81 km) |
| Sunnyvale to Sevlievo | 6,510.27 mi (10,477.27 km) |
| Sunnyvale to Shumen | 6,532.81 mi (10,513.55 km) |
| Sunnyvale to Silistra | 6,486.92 mi (10,439.69 km) |
| Sunnyvale to Sliven | 6,557.96 mi (10,554.02 km) |
