| Kettering to Popovo | 1,385.73 mi (2,230.12 km) |
| Kettering to Provadia | 1,441.29 mi (2,319.52 km) |
| Kettering to Radnevo | 1,417.77 mi (2,281.68 km) |
| Kettering to Radomir | 1,289.07 mi (2,074.56 km) |
| Kettering to Rakitovo | 1,358.60 mi (2,186.46 km) |
| Kettering to Rakovski | 1,379.80 mi (2,220.57 km) |
| Kettering to Razgrad | 1,389.80 mi (2,236.67 km) |
| Kettering to Razlog | 1,339.12 mi (2,155.10 km) |
| Kettering to Ruse | 1,355.28 mi (2,181.11 km) |
| Kettering to Samokov | 1,322.17 mi (2,127.83 km) |
| Kettering to Sandanski | 1,346.43 mi (2,166.87 km) |
| Kettering to Sevlievo | 1,354.05 mi (2,179.13 km) |
| Kettering to Shumen | 1,416.87 mi (2,280.23 km) |
| Kettering to Silistra | 1,397.16 mi (2,248.50 km) |
| Kettering to Sliven | 1,417.45 mi (2,281.16 km) |
