| Porvoo to Oberriet | 1,110.23 mi (1,786.75 km) |
| Porvoo to Obersiggenthal | 1,130.46 mi (1,819.29 km) |
| Porvoo to Oberwil | 1,147.16 mi (1,846.18 km) |
| Porvoo to Oberwingert | 1,117.11 mi (1,797.82 km) |
| Porvoo to Oftringen | 1,149.68 mi (1,850.23 km) |
| Porvoo to Olten | 1,148.13 mi (1,847.74 km) |
| Porvoo to Onex | 1,261.56 mi (2,030.28 km) |
| Porvoo to Opfikon | 1,126.94 mi (1,813.64 km) |
| Porvoo to Ostermundigen | 1,181.49 mi (1,901.43 km) |
| Porvoo to Payerne | 1,203.45 mi (1,936.77 km) |
| Porvoo to Pfaffikon | 1,125.68 mi (1,811.61 km) |
| Porvoo to Plan-les-Ouates | 1,262.11 mi (2,031.17 km) |
| Porvoo to Pratteln | 1,143.34 mi (1,840.02 km) |
| Porvoo to Prilly | 1,228.43 mi (1,976.97 km) |
| Porvoo to Pully | 1,227.73 mi (1,975.84 km) |
