| McKeesport to Opwijk | 3,899.71 mi (6,275.97 km) |
| McKeesport to Ostend | 3,842.33 mi (6,183.64 km) |
| McKeesport to Oud-Heverlee | 3,922.70 mi (6,312.97 km) |
| McKeesport to Oud-Turnhout | 3,921.12 mi (6,310.44 km) |
| McKeesport to Oudenaarde | 3,879.89 mi (6,244.09 km) |
| McKeesport to Oudenburg | 3,846.71 mi (6,190.68 km) |
| McKeesport to Oupeye | 3,964.97 mi (6,381.00 km) |
| McKeesport to Overijse | 3,918.87 mi (6,306.81 km) |
| McKeesport to Overpelt | 3,941.03 mi (6,342.47 km) |
| McKeesport to Paal | 3,936.66 mi (6,335.43 km) |
| McKeesport to Peer | 3,944.94 mi (6,348.77 km) |
| McKeesport to Pepinster | 3,976.06 mi (6,398.86 km) |
| McKeesport to Peruwelz | 3,888.73 mi (6,258.30 km) |
| McKeesport to Perwez | 3,934.69 mi (6,332.27 km) |
| McKeesport to Philippeville | 3,936.59 mi (6,335.32 km) |
