| Keflavik to Popovo | 2,364.16 mi (3,804.75 km) |
| Keflavik to Provadia | 2,408.91 mi (3,876.77 km) |
| Keflavik to Radnevo | 2,414.48 mi (3,885.73 km) |
| Keflavik to Radomir | 2,313.58 mi (3,723.34 km) |
| Keflavik to Rakitovo | 2,378.62 mi (3,828.03 km) |
| Keflavik to Rakovski | 2,386.87 mi (3,841.30 km) |
| Keflavik to Razgrad | 2,362.27 mi (3,801.71 km) |
| Keflavik to Razlog | 2,366.53 mi (3,808.56 km) |
| Keflavik to Ruse | 2,329.51 mi (3,748.98 km) |
| Keflavik to Samokov | 2,343.18 mi (3,770.99 km) |
| Keflavik to Sandanski | 2,379.30 mi (3,829.11 km) |
| Keflavik to Sevlievo | 2,349.50 mi (3,781.15 km) |
| Keflavik to Shumen | 2,388.54 mi (3,843.98 km) |
| Keflavik to Silistra | 2,351.82 mi (3,784.88 km) |
| Keflavik to Sliven | 2,404.55 mi (3,869.76 km) |
