| Piqua to Opole | 4,604.23 mi (7,409.80 km) |
| Piqua to Orzesze | 4,654.29 mi (7,490.36 km) |
| Piqua to Osowa | 4,473.67 mi (7,199.67 km) |
| Piqua to Ostroda | 4,552.18 mi (7,326.03 km) |
| Piqua to Ostroleka | 4,631.22 mi (7,453.23 km) |
| Piqua to Ostrow Mazowiecka | 4,653.41 mi (7,488.95 km) |
| Piqua to Ostrow Wielkopolski | 4,560.85 mi (7,339.99 km) |
| Piqua to Ostrowiec Swietokrzyski | 4,714.88 mi (7,587.87 km) |
| Piqua to Ostrzeszow | 4,574.22 mi (7,361.50 km) |
| Piqua to Oswiecim | 4,675.70 mi (7,524.82 km) |
| Piqua to Otwock | 4,660.72 mi (7,500.71 km) |
| Piqua to Ozarow Mazowiecki | 4,640.76 mi (7,468.58 km) |
| Piqua to Ozimek | 4,613.94 mi (7,425.42 km) |
| Piqua to Ozorkow | 4,599.14 mi (7,401.60 km) |
| Piqua to Pabianice | 4,615.45 mi (7,427.86 km) |
