| Mariehamn to Novi di Modena | 1,114.85 mi (1,794.18 km) |
| Mariehamn to Novi Ligure | 1,155.67 mi (1,859.87 km) |
| Mariehamn to Nuoro | 1,440.84 mi (2,318.81 km) |
| Mariehamn to Occhiobello | 1,103.91 mi (1,776.57 km) |
| Mariehamn to Oderzo | 1,035.18 mi (1,665.96 km) |
| Mariehamn to Oggiono | 1,079.80 mi (1,737.78 km) |
| Mariehamn to Olbia | 1,398.54 mi (2,250.72 km) |
| Mariehamn to Oleggio | 1,103.70 mi (1,776.23 km) |
| Mariehamn to Olgiate Comasco | 1,086.17 mi (1,748.03 km) |
| Mariehamn to Olgiate Olona | 1,097.29 mi (1,765.92 km) |
| Mariehamn to Omegna | 1,089.71 mi (1,753.73 km) |
| Mariehamn to Opera | 1,107.99 mi (1,783.14 km) |
| Mariehamn to Oppeano | 1,084.02 mi (1,744.56 km) |
| Mariehamn to Orbassano | 1,161.19 mi (1,868.75 km) |
| Mariehamn to Orbetello | 1,274.56 mi (2,051.20 km) |
