| Piqua to Oschatz | 4,405.65 mi (7,090.20 km) |
| Piqua to Oschersleben | 4,311.91 mi (6,939.36 km) |
| Piqua to Osnabruck | 4,185.04 mi (6,735.17 km) |
| Piqua to Ostbevern | 4,185.56 mi (6,736.01 km) |
| Piqua to Osterburg | 4,303.46 mi (6,925.75 km) |
| Piqua to Ostercappeln | 4,189.60 mi (6,742.52 km) |
| Piqua to Osterhofen | 4,499.69 mi (7,241.54 km) |
| Piqua to Osterholz-Scharmbeck | 4,181.53 mi (6,729.53 km) |
| Piqua to Osternienburg | 4,347.63 mi (6,996.83 km) |
| Piqua to Osterode | 4,285.41 mi (6,896.71 km) |
| Piqua to Osterwieck | 4,294.17 mi (6,910.79 km) |
| Piqua to Ostfildern | 4,353.12 mi (7,005.67 km) |
| Piqua to Osthofen | 4,283.05 mi (6,892.91 km) |
| Piqua to Ostrhauderfehn | 4,141.70 mi (6,665.42 km) |
| Piqua to Ostringen | 4,314.91 mi (6,944.17 km) |
