| Callaway to Popovo | 5,777.37 mi (9,297.78 km) |
| Callaway to Provadia | 5,832.76 mi (9,386.92 km) |
| Callaway to Radnevo | 5,807.76 mi (9,346.69 km) |
| Callaway to Radomir | 5,673.29 mi (9,130.28 km) |
| Callaway to Rakitovo | 5,743.22 mi (9,242.83 km) |
| Callaway to Rakovski | 5,768.06 mi (9,282.80 km) |
| Callaway to Razgrad | 5,781.37 mi (9,304.22 km) |
| Callaway to Razlog | 5,721.10 mi (9,207.21 km) |
| Callaway to Ruse | 5,746.85 mi (9,248.66 km) |
| Callaway to Samokov | 5,707.08 mi (9,184.66 km) |
| Callaway to Sandanski | 5,725.58 mi (9,214.43 km) |
| Callaway to Sevlievo | 5,744.68 mi (9,245.16 km) |
| Callaway to Shumen | 5,808.45 mi (9,347.80 km) |
| Callaway to Silistra | 5,787.21 mi (9,313.61 km) |
| Callaway to Sliven | 5,808.62 mi (9,348.08 km) |
