| Iona to Popovo | 5,808.70 mi (9,348.21 km) |
| Iona to Provadia | 5,866.13 mi (9,440.63 km) |
| Iona to Radnevo | 5,833.32 mi (9,387.82 km) |
| Iona to Radomir | 5,693.15 mi (9,162.25 km) |
| Iona to Rakitovo | 5,762.88 mi (9,274.46 km) |
| Iona to Rakovski | 5,791.27 mi (9,320.15 km) |
| Iona to Razgrad | 5,814.25 mi (9,357.14 km) |
| Iona to Razlog | 5,738.83 mi (9,235.76 km) |
| Iona to Ruse | 5,779.82 mi (9,301.72 km) |
| Iona to Samokov | 5,727.26 mi (9,217.14 km) |
| Iona to Sandanski | 5,741.33 mi (9,239.78 km) |
| Iona to Sevlievo | 5,771.83 mi (9,288.86 km) |
| Iona to Shumen | 5,841.11 mi (9,400.36 km) |
| Iona to Silistra | 5,824.64 mi (9,373.85 km) |
| Iona to Sliven | 5,836.98 mi (9,393.71 km) |
