| McKeesport to Oberkirch | 4,130.33 mi (6,647.12 km) |
| McKeesport to Obernburg am Main | 4,129.87 mi (6,646.39 km) |
| McKeesport to Obernkirchen | 4,051.63 mi (6,520.46 km) |
| McKeesport to Oberschleissheim | 4,279.34 mi (6,886.93 km) |
| McKeesport to Oberstdorf | 4,256.82 mi (6,850.69 km) |
| McKeesport to Obertraubling | 4,278.07 mi (6,884.88 km) |
| McKeesport to Obertshausen | 4,110.43 mi (6,615.10 km) |
| McKeesport to Oberursel | 4,095.99 mi (6,591.86 km) |
| McKeesport to Ochsenfurt | 4,172.45 mi (6,714.91 km) |
| McKeesport to Ochsenhausen | 4,220.77 mi (6,792.68 km) |
| McKeesport to Ochtrup | 3,980.33 mi (6,405.72 km) |
| McKeesport to Odenthal | 4,012.95 mi (6,458.21 km) |
| McKeesport to Oelde | 4,028.28 mi (6,482.89 km) |
| McKeesport to Oelsnitz | 4,227.99 mi (6,804.29 km) |
| McKeesport to Oer-Erkenschwick | 3,999.61 mi (6,436.75 km) |
