| Rio Maior to Oststeinbek | 1,329.94 mi (2,140.33 km) |
| Rio Maior to Ottendorf-Okrilla | 1,367.25 mi (2,200.37 km) |
| Rio Maior to Ottersberg | 1,278.10 mi (2,056.90 km) |
| Rio Maior to Ottobrunn | 1,187.37 mi (1,910.89 km) |
| Rio Maior to Ottweiler | 1,051.21 mi (1,691.76 km) |
| Rio Maior to Overath | 1,122.21 mi (1,806.02 km) |
| Rio Maior to Oyten | 1,272.19 mi (2,047.39 km) |
| Rio Maior to Paderborn | 1,204.39 mi (1,938.27 km) |
| Rio Maior to Papenburg | 1,223.05 mi (1,968.31 km) |
| Rio Maior to Parchim | 1,378.38 mi (2,218.28 km) |
| Rio Maior to Pasewalk | 1,454.91 mi (2,341.44 km) |
| Rio Maior to Passau | 1,277.11 mi (2,055.30 km) |
| Rio Maior to Pattensen | 1,261.67 mi (2,030.46 km) |
| Rio Maior to Pegnitz | 1,232.56 mi (1,983.62 km) |
| Rio Maior to Peine | 1,279.61 mi (2,059.33 km) |
