| Mariehamn to Olivenza | 1,887.69 mi (3,037.95 km) |
| Mariehamn to Olot | 1,440.65 mi (2,318.50 km) |
| Mariehamn to Onate | 1,505.11 mi (2,422.24 km) |
| Mariehamn to Onda | 1,640.34 mi (2,639.87 km) |
| Mariehamn to Onteniente | 1,719.51 mi (2,767.28 km) |
| Mariehamn to Orihuela | 1,773.45 mi (2,854.10 km) |
| Mariehamn to Osuna | 1,924.63 mi (3,097.39 km) |
| Mariehamn to Ourense | 1,694.29 mi (2,726.70 km) |
| Mariehamn to Oviedo | 1,578.48 mi (2,540.32 km) |
| Mariehamn to Paiporta | 1,677.27 mi (2,699.31 km) |
| Mariehamn to Pajara | 2,706.81 mi (4,356.18 km) |
| Mariehamn to Palafolls | 1,467.37 mi (2,361.51 km) |
| Mariehamn to Palafrugell | 1,443.09 mi (2,322.43 km) |
| Mariehamn to Palamos | 1,448.32 mi (2,330.85 km) |
| Mariehamn to Palencia | 1,620.81 mi (2,608.45 km) |
