| Biddeford to Devnya | 4,600.96 mi (7,404.53 km) |
| Biddeford to Dimitrovgrad | 4,572.20 mi (7,358.24 km) |
| Biddeford to Dobrich | 4,596.40 mi (7,397.19 km) |
| Biddeford to Dospat | 4,530.67 mi (7,291.41 km) |
| Biddeford to Dupnitsa | 4,462.09 mi (7,181.03 km) |
| Biddeford to Elhovo | 4,606.20 mi (7,412.97 km) |
| Biddeford to Etropole | 4,474.52 mi (7,201.04 km) |
| Biddeford to Gabrovo | 4,526.93 mi (7,285.39 km) |
| Biddeford to Gorna Oryahovitsa | 4,530.40 mi (7,290.97 km) |
| Biddeford to Gotse Delchev | 4,516.35 mi (7,268.36 km) |
| Biddeford to Harmanli | 4,589.30 mi (7,385.76 km) |
| Biddeford to Haskovo | 4,575.80 mi (7,364.04 km) |
| Biddeford to Ihtiman | 4,483.48 mi (7,215.46 km) |
| Biddeford to Isperih | 4,550.69 mi (7,323.63 km) |
| Biddeford to Kardzhali | 4,579.71 mi (7,370.33 km) |
