| Idanha-a-Nova to Oberriet | 980.57 mi (1,578.07 km) |
| Idanha-a-Nova to Obersiggenthal | 932.71 mi (1,501.06 km) |
| Idanha-a-Nova to Oberwil | 903.58 mi (1,454.17 km) |
| Idanha-a-Nova to Oberwingert | 953.35 mi (1,534.26 km) |
| Idanha-a-Nova to Oftringen | 911.67 mi (1,467.20 km) |
| Idanha-a-Nova to Olten | 912.09 mi (1,467.87 km) |
| Idanha-a-Nova to Onex | 798.80 mi (1,285.55 km) |
| Idanha-a-Nova to Opfikon | 942.29 mi (1,516.47 km) |
| Idanha-a-Nova to Ostermundigen | 882.13 mi (1,419.65 km) |
| Idanha-a-Nova to Payerne | 854.49 mi (1,375.17 km) |
| Idanha-a-Nova to Pfaffikon | 949.18 mi (1,527.56 km) |
| Idanha-a-Nova to Plan-les-Ouates | 798.97 mi (1,285.82 km) |
| Idanha-a-Nova to Pratteln | 909.57 mi (1,463.81 km) |
| Idanha-a-Nova to Prilly | 831.25 mi (1,337.76 km) |
| Idanha-a-Nova to Pully | 833.50 mi (1,341.38 km) |
