| McHenry to Opole | 4,632.29 mi (7,454.96 km) |
| McHenry to Orzesze | 4,682.78 mi (7,536.21 km) |
| McHenry to Osowa | 4,485.93 mi (7,219.41 km) |
| McHenry to Ostroda | 4,564.70 mi (7,346.17 km) |
| McHenry to Ostroleka | 4,643.26 mi (7,472.60 km) |
| McHenry to Ostrow Mazowiecka | 4,665.84 mi (7,508.95 km) |
| McHenry to Ostrow Wielkopolski | 4,585.30 mi (7,379.33 km) |
| McHenry to Ostrowiec Swietokrzyski | 4,735.28 mi (7,620.69 km) |
| McHenry to Ostrzeszow | 4,599.36 mi (7,401.96 km) |
| McHenry to Oswiecim | 4,703.71 mi (7,569.88 km) |
| McHenry to Otwock | 4,676.93 mi (7,526.78 km) |
| McHenry to Ozarow Mazowiecki | 4,657.47 mi (7,495.47 km) |
| McHenry to Ozimek | 4,641.44 mi (7,469.68 km) |
| McHenry to Ozorkow | 4,619.63 mi (7,434.58 km) |
| McHenry to Pabianice | 4,636.99 mi (7,462.51 km) |
