| Sligo to Orzesze | 1,179.55 mi (1,898.30 km) |
| Sligo to Osowa | 1,078.92 mi (1,736.36 km) |
| Sligo to Ostroda | 1,148.69 mi (1,848.64 km) |
| Sligo to Ostroleka | 1,223.59 mi (1,969.18 km) |
| Sligo to Ostrow Mazowiecka | 1,242.11 mi (1,998.98 km) |
| Sligo to Ostrow Wielkopolski | 1,102.81 mi (1,774.81 km) |
| Sligo to Ostrowiec Swietokrzyski | 1,265.09 mi (2,035.96 km) |
| Sligo to Ostrzeszow | 1,113.07 mi (1,791.32 km) |
| Sligo to Oswiecim | 1,201.77 mi (1,934.06 km) |
| Sligo to Otwock | 1,231.15 mi (1,981.34 km) |
| Sligo to Ozarow Mazowiecki | 1,210.20 mi (1,947.63 km) |
| Sligo to Ozimek | 1,143.39 mi (1,840.10 km) |
| Sligo to Ozorkow | 1,154.69 mi (1,858.30 km) |
| Sligo to Pabianice | 1,165.99 mi (1,876.48 km) |
| Sligo to Parczew | 1,306.64 mi (2,102.83 km) |
