| Piraeus to Oberriet | 962.57 mi (1,549.11 km) |
| Piraeus to Obersiggenthal | 1,017.72 mi (1,637.87 km) |
| Piraeus to Oberwil | 1,047.28 mi (1,685.44 km) |
| Piraeus to Oberwingert | 1,000.77 mi (1,610.59 km) |
| Piraeus to Oftringen | 1,025.66 mi (1,650.65 km) |
| Piraeus to Olten | 1,027.59 mi (1,653.74 km) |
| Piraeus to Onex | 1,061.43 mi (1,708.20 km) |
| Piraeus to Opfikon | 1,005.09 mi (1,617.54 km) |
| Piraeus to Ostermundigen | 1,029.23 mi (1,656.38 km) |
| Piraeus to Payerne | 1,046.97 mi (1,684.93 km) |
| Piraeus to Pfaffikon | 994.17 mi (1,599.96 km) |
| Piraeus to Plan-les-Ouates | 1,060.20 mi (1,706.23 km) |
| Piraeus to Pratteln | 1,041.74 mi (1,676.52 km) |
| Piraeus to Prilly | 1,051.28 mi (1,691.87 km) |
| Piraeus to Pully | 1,047.94 mi (1,686.50 km) |
