| Costa Mesa to Popovo | 6,654.71 mi (10,709.72 km) |
| Costa Mesa to Provadia | 6,693.99 mi (10,772.93 km) |
| Costa Mesa to Radnevo | 6,710.36 mi (10,799.28 km) |
| Costa Mesa to Radomir | 6,617.69 mi (10,650.14 km) |
| Costa Mesa to Rakitovo | 6,681.33 mi (10,752.56 km) |
| Costa Mesa to Rakovski | 6,686.30 mi (10,760.57 km) |
| Costa Mesa to Razgrad | 6,650.61 mi (10,703.12 km) |
| Costa Mesa to Razlog | 6,670.77 mi (10,735.57 km) |
| Costa Mesa to Ruse | 6,619.37 mi (10,652.85 km) |
| Costa Mesa to Samokov | 6,646.41 mi (10,696.36 km) |
| Costa Mesa to Sandanski | 6,684.34 mi (10,757.40 km) |
| Costa Mesa to Sevlievo | 6,646.12 mi (10,695.90 km) |
| Costa Mesa to Shumen | 6,675.86 mi (10,743.75 km) |
| Costa Mesa to Silistra | 6,633.17 mi (10,675.05 km) |
| Costa Mesa to Sliven | 6,697.34 mi (10,778.33 km) |
