| Fort Smith to Popovo | 5,840.90 mi (9,400.02 km) |
| Fort Smith to Provadia | 5,891.41 mi (9,481.30 km) |
| Fort Smith to Radnevo | 5,881.55 mi (9,465.44 km) |
| Fort Smith to Radomir | 5,760.25 mi (9,270.22 km) |
| Fort Smith to Rakitovo | 5,829.23 mi (9,381.23 km) |
| Fort Smith to Rakovski | 5,846.97 mi (9,409.79 km) |
| Fort Smith to Razgrad | 5,841.92 mi (9,401.66 km) |
| Fort Smith to Razlog | 5,811.09 mi (9,352.05 km) |
| Fort Smith to Ruse | 5,807.89 mi (9,346.89 km) |
| Fort Smith to Samokov | 5,792.79 mi (9,322.60 km) |
| Fort Smith to Sandanski | 5,819.18 mi (9,365.06 km) |
| Fort Smith to Sevlievo | 5,816.66 mi (9,361.02 km) |
| Fort Smith to Shumen | 5,868.90 mi (9,445.08 km) |
| Fort Smith to Silistra | 5,839.10 mi (9,397.12 km) |
| Fort Smith to Sliven | 5,877.15 mi (9,458.36 km) |
