| Donostia to Opole | 1,062.19 mi (1,709.43 km) |
| Donostia to Orzesze | 1,084.33 mi (1,745.05 km) |
| Donostia to Osowa | 1,197.54 mi (1,927.26 km) |
| Donostia to Ostroda | 1,226.07 mi (1,973.17 km) |
| Donostia to Ostroleka | 1,267.68 mi (2,040.14 km) |
| Donostia to Ostrow Mazowiecka | 1,273.67 mi (2,049.77 km) |
| Donostia to Ostrow Wielkopolski | 1,083.56 mi (1,743.82 km) |
| Donostia to Ostrowiec Swietokrzyski | 1,211.49 mi (1,949.70 km) |
| Donostia to Ostrzeszow | 1,081.67 mi (1,740.78 km) |
| Donostia to Oswiecim | 1,101.98 mi (1,773.46 km) |
| Donostia to Otwock | 1,231.95 mi (1,982.64 km) |
| Donostia to Ozarow Mazowiecki | 1,215.92 mi (1,956.83 km) |
| Donostia to Ozimek | 1,073.82 mi (1,728.14 km) |
| Donostia to Ozorkow | 1,149.76 mi (1,850.37 km) |
| Donostia to Pabianice | 1,145.41 mi (1,843.36 km) |
