| Donostia to Devnya | 1,478.69 mi (2,379.72 km) |
| Donostia to Dimitrovgrad | 1,397.16 mi (2,248.51 km) |
| Donostia to Dobrich | 1,487.61 mi (2,394.08 km) |
| Donostia to Dospat | 1,331.77 mi (2,143.28 km) |
| Donostia to Dupnitsa | 1,269.83 mi (2,043.60 km) |
| Donostia to Elhovo | 1,443.65 mi (2,323.33 km) |
| Donostia to Etropole | 1,306.30 mi (2,102.29 km) |
| Donostia to Gabrovo | 1,372.27 mi (2,208.46 km) |
| Donostia to Gorna Oryahovitsa | 1,387.18 mi (2,232.44 km) |
| Donostia to Gotse Delchev | 1,311.41 mi (2,110.51 km) |
| Donostia to Harmanli | 1,413.99 mi (2,275.60 km) |
| Donostia to Haskovo | 1,397.32 mi (2,248.77 km) |
| Donostia to Ihtiman | 1,302.33 mi (2,095.90 km) |
| Donostia to Isperih | 1,436.59 mi (2,311.97 km) |
| Donostia to Kardzhali | 1,391.92 mi (2,240.07 km) |
