| Arouca to Opole | 1,418.47 mi (2,282.80 km) |
| Arouca to Orzesze | 1,442.45 mi (2,321.41 km) |
| Arouca to Osowa | 1,537.95 mi (2,475.08 km) |
| Arouca to Ostroda | 1,572.39 mi (2,530.52 km) |
| Arouca to Ostroleka | 1,618.43 mi (2,604.61 km) |
| Arouca to Ostrow Mazowiecka | 1,625.70 mi (2,616.31 km) |
| Arouca to Ostrow Wielkopolski | 1,436.29 mi (2,311.48 km) |
| Arouca to Ostrowiec Swietokrzyski | 1,568.92 mi (2,524.93 km) |
| Arouca to Ostrzeszow | 1,435.40 mi (2,310.05 km) |
| Arouca to Oswiecim | 1,460.55 mi (2,350.54 km) |
| Arouca to Otwock | 1,585.90 mi (2,552.26 km) |
| Arouca to Ozarow Mazowiecki | 1,569.18 mi (2,525.35 km) |
| Arouca to Ozimek | 1,430.26 mi (2,301.78 km) |
| Arouca to Ozorkow | 1,502.67 mi (2,418.31 km) |
| Arouca to Pabianice | 1,499.54 mi (2,413.28 km) |
