| Boulder to Oststeinbek | 4,920.71 mi (7,919.12 km) |
| Boulder to Ottendorf-Okrilla | 5,145.33 mi (8,280.62 km) |
| Boulder to Ottersberg | 4,910.78 mi (7,903.13 km) |
| Boulder to Ottobrunn | 5,231.37 mi (8,419.08 km) |
| Boulder to Ottweiler | 5,021.02 mi (8,080.55 km) |
| Boulder to Overath | 4,952.22 mi (7,969.82 km) |
| Boulder to Oyten | 4,908.54 mi (7,899.54 km) |
| Boulder to Paderborn | 4,963.05 mi (7,987.26 km) |
| Boulder to Papenburg | 4,858.29 mi (7,818.66 km) |
| Boulder to Parchim | 4,976.39 mi (8,008.73 km) |
| Boulder to Pasewalk | 5,035.43 mi (8,103.75 km) |
| Boulder to Passau | 5,263.93 mi (8,471.47 km) |
| Boulder to Pattensen | 4,968.85 mi (7,996.60 km) |
| Boulder to Pegnitz | 5,144.90 mi (8,279.91 km) |
| Boulder to Peine | 4,980.68 mi (8,015.64 km) |
