| Kailua to Popovo | 7,956.44 mi (12,804.65 km) |
| Kailua to Provadia | 7,962.96 mi (12,815.15 km) |
| Kailua to Radnevo | 8,029.86 mi (12,922.81 km) |
| Kailua to Radomir | 8,018.61 mi (12,904.71 km) |
| Kailua to Rakitovo | 8,056.43 mi (12,965.58 km) |
| Kailua to Rakovski | 8,033.52 mi (12,928.69 km) |
| Kailua to Razgrad | 7,942.76 mi (12,782.63 km) |
| Kailua to Razlog | 8,064.21 mi (12,978.10 km) |
| Kailua to Ruse | 7,924.79 mi (12,753.71 km) |
| Kailua to Samokov | 8,032.76 mi (12,927.49 km) |
| Kailua to Sandanski | 8,086.18 mi (13,013.45 km) |
| Kailua to Sevlievo | 7,982.27 mi (12,846.22 km) |
| Kailua to Shumen | 7,958.30 mi (12,807.65 km) |
| Kailua to Silistra | 7,899.49 mi (12,713.00 km) |
| Kailua to Sliven | 8,002.02 mi (12,878.00 km) |
