| Somersworth to Popovo | 4,568.81 mi (7,352.78 km) |
| Somersworth to Provadia | 4,623.42 mi (7,440.68 km) |
| Somersworth to Radnevo | 4,601.36 mi (7,405.18 km) |
| Somersworth to Radomir | 4,469.80 mi (7,193.45 km) |
| Somersworth to Rakitovo | 4,539.65 mi (7,305.86 km) |
| Somersworth to Rakovski | 4,562.76 mi (7,343.05 km) |
| Somersworth to Razgrad | 4,572.27 mi (7,358.36 km) |
| Somersworth to Razlog | 4,518.54 mi (7,271.89 km) |
| Somersworth to Ruse | 4,537.77 mi (7,302.84 km) |
| Somersworth to Samokov | 4,503.34 mi (7,247.43 km) |
| Somersworth to Sandanski | 4,524.06 mi (7,280.77 km) |
| Somersworth to Sevlievo | 4,537.75 mi (7,302.80 km) |
| Somersworth to Shumen | 4,599.38 mi (7,401.99 km) |
| Somersworth to Silistra | 4,576.71 mi (7,365.50 km) |
| Somersworth to Sliven | 4,601.10 mi (7,404.76 km) |
