| Gretna to Popovo | 5,968.17 mi (9,604.84 km) |
| Gretna to Provadia | 6,022.21 mi (9,691.81 km) |
| Gretna to Radnevo | 6,001.76 mi (9,658.90 km) |
| Gretna to Radomir | 5,870.87 mi (9,448.26 km) |
| Gretna to Rakitovo | 5,940.70 mi (9,560.64 km) |
| Gretna to Rakovski | 5,963.49 mi (9,597.31 km) |
| Gretna to Razgrad | 5,971.27 mi (9,609.83 km) |
| Gretna to Razlog | 5,919.70 mi (9,526.83 km) |
| Gretna to Ruse | 5,936.81 mi (9,554.36 km) |
| Gretna to Samokov | 5,904.38 mi (9,502.18 km) |
| Gretna to Sandanski | 5,925.25 mi (9,535.77 km) |
| Gretna to Sevlievo | 5,937.96 mi (9,556.23 km) |
| Gretna to Shumen | 5,998.39 mi (9,653.48 km) |
| Gretna to Silistra | 5,974.44 mi (9,614.94 km) |
| Gretna to Sliven | 6,001.03 mi (9,657.73 km) |
