| Oulu to Orzesze | 1,055.35 mi (1,698.42 km) |
| Oulu to Osowa | 769.97 mi (1,239.14 km) |
| Oulu to Ostroda | 804.68 mi (1,295.00 km) |
| Oulu to Ostroleka | 836.69 mi (1,346.52 km) |
| Oulu to Ostrow Mazowiecka | 853.15 mi (1,373.02 km) |
| Oulu to Ostrow Wielkopolski | 962.61 mi (1,549.17 km) |
| Oulu to Ostrowiec Swietokrzyski | 983.77 mi (1,583.23 km) |
| Oulu to Ostrzeszow | 977.10 mi (1,572.49 km) |
| Oulu to Oswiecim | 1,059.17 mi (1,704.57 km) |
| Oulu to Otwock | 903.43 mi (1,453.93 km) |
| Oulu to Ozarow Mazowiecki | 899.46 mi (1,447.54 km) |
| Oulu to Ozimek | 1,024.60 mi (1,648.94 km) |
| Oulu to Ozorkow | 927.71 mi (1,493.01 km) |
| Oulu to Pabianice | 948.37 mi (1,526.25 km) |
| Oulu to Parczew | 929.15 mi (1,495.33 km) |
