| Union City to Popovo | 6,499.85 mi (10,460.49 km) |
| Union City to Provadia | 6,535.16 mi (10,517.32 km) |
| Union City to Radnevo | 6,559.30 mi (10,556.18 km) |
| Union City to Radomir | 6,477.00 mi (10,423.72 km) |
| Union City to Rakitovo | 6,538.02 mi (10,521.93 km) |
| Union City to Rakovski | 6,538.88 mi (10,523.31 km) |
| Union City to Razgrad | 6,494.25 mi (10,451.48 km) |
| Union City to Razlog | 6,530.04 mi (10,509.08 km) |
| Union City to Ruse | 6,464.31 mi (10,403.30 km) |
| Union City to Samokov | 6,504.08 mi (10,467.30 km) |
| Union City to Sandanski | 6,545.18 mi (10,533.45 km) |
| Union City to Sevlievo | 6,496.19 mi (10,454.61 km) |
| Union City to Shumen | 6,518.60 mi (10,490.68 km) |
| Union City to Silistra | 6,472.66 mi (10,416.74 km) |
| Union City to Sliven | 6,543.81 mi (10,531.25 km) |
