| Natchitoches to Popovo | 5,988.38 mi (9,637.37 km) |
| Natchitoches to Provadia | 6,040.71 mi (9,721.58 km) |
| Natchitoches to Radnevo | 6,025.58 mi (9,697.23 km) |
| Natchitoches to Radomir | 5,899.29 mi (9,493.99 km) |
| Natchitoches to Rakitovo | 5,968.80 mi (9,605.86 km) |
| Natchitoches to Rakovski | 5,989.10 mi (9,638.53 km) |
| Natchitoches to Razgrad | 5,990.43 mi (9,640.67 km) |
| Natchitoches to Razlog | 5,949.19 mi (9,574.30 km) |
| Natchitoches to Ruse | 5,956.13 mi (9,585.47 km) |
| Natchitoches to Samokov | 5,932.37 mi (9,547.22 km) |
| Natchitoches to Sandanski | 5,956.01 mi (9,585.28 km) |
| Natchitoches to Sevlievo | 5,961.14 mi (9,593.53 km) |
| Natchitoches to Shumen | 6,017.52 mi (9,684.26 km) |
| Natchitoches to Silistra | 5,990.56 mi (9,640.88 km) |
| Natchitoches to Sliven | 6,023.00 mi (9,693.08 km) |
