| Prudhoe to Popovo | 1,485.85 mi (2,391.24 km) |
| Prudhoe to Provadia | 1,538.24 mi (2,475.55 km) |
| Prudhoe to Radnevo | 1,524.81 mi (2,453.95 km) |
| Prudhoe to Radomir | 1,405.57 mi (2,262.04 km) |
| Prudhoe to Rakitovo | 1,473.92 mi (2,372.05 km) |
| Prudhoe to Rakovski | 1,490.34 mi (2,398.47 km) |
| Prudhoe to Razgrad | 1,487.86 mi (2,394.47 km) |
| Prudhoe to Razlog | 1,457.20 mi (2,345.13 km) |
| Prudhoe to Ruse | 1,453.55 mi (2,339.26 km) |
| Prudhoe to Samokov | 1,437.57 mi (2,313.54 km) |
| Prudhoe to Sandanski | 1,466.76 mi (2,360.53 km) |
| Prudhoe to Sevlievo | 1,460.00 mi (2,349.64 km) |
| Prudhoe to Shumen | 1,514.95 mi (2,438.08 km) |
| Prudhoe to Silistra | 1,489.13 mi (2,396.53 km) |
| Prudhoe to Sliven | 1,521.00 mi (2,447.82 km) |
