| Clayton to Opole | 859.94 mi (1,383.94 km) |
| Clayton to Orzesze | 907.01 mi (1,459.69 km) |
| Clayton to Osowa | 820.07 mi (1,319.78 km) |
| Clayton to Ostroda | 886.55 mi (1,426.77 km) |
| Clayton to Ostroleka | 959.51 mi (1,544.18 km) |
| Clayton to Ostrow Mazowiecka | 977.15 mi (1,572.57 km) |
| Clayton to Ostrow Wielkopolski | 831.91 mi (1,338.83 km) |
| Clayton to Ostrowiec Swietokrzyski | 994.39 mi (1,600.32 km) |
| Clayton to Ostrzeszow | 841.76 mi (1,354.68 km) |
| Clayton to Oswiecim | 929.24 mi (1,495.47 km) |
| Clayton to Otwock | 963.36 mi (1,550.38 km) |
| Clayton to Ozarow Mazowiecki | 942.45 mi (1,516.72 km) |
| Clayton to Ozimek | 871.13 mi (1,401.94 km) |
| Clayton to Ozorkow | 885.31 mi (1,424.77 km) |
| Clayton to Pabianice | 895.84 mi (1,441.72 km) |
