| Piqua to Norwich | 3,919.90 mi (6,308.46 km) |
| Piqua to Nottingham | 3,817.33 mi (6,143.40 km) |
| Piqua to Nuneaton | 3,816.47 mi (6,142.01 km) |
| Piqua to Oadby | 3,829.62 mi (6,163.18 km) |
| Piqua to Oakengates | 3,773.80 mi (6,073.34 km) |
| Piqua to Oakham | 3,840.94 mi (6,181.39 km) |
| Piqua to Oldbury | 3,795.65 mi (6,108.51 km) |
| Piqua to Oldham | 3,764.95 mi (6,059.10 km) |
| Piqua to Ollerton | 3,815.79 mi (6,140.92 km) |
| Piqua to Olton | 3,805.60 mi (6,124.52 km) |
| Piqua to Omagh | 3,543.18 mi (5,702.19 km) |
| Piqua to Ormesby | 3,774.78 mi (6,074.92 km) |
| Piqua to Ormskirk | 3,734.95 mi (6,010.82 km) |
| Piqua to Orpington | 3,909.28 mi (6,291.37 km) |
| Piqua to Ossett | 3,781.94 mi (6,086.44 km) |
