| Gallup to Oberkirch | 5,453.14 mi (8,775.98 km) |
| Gallup to Obernburg am Main | 5,427.35 mi (8,734.47 km) |
| Gallup to Obernkirchen | 5,313.17 mi (8,550.72 km) |
| Gallup to Oberschleissheim | 5,582.64 mi (8,984.39 km) |
| Gallup to Oberstdorf | 5,580.35 mi (8,980.71 km) |
| Gallup to Obertraubling | 5,567.27 mi (8,959.66 km) |
| Gallup to Obertshausen | 5,406.66 mi (8,701.18 km) |
| Gallup to Oberursel | 5,391.91 mi (8,677.44 km) |
| Gallup to Ochsenfurt | 5,466.48 mi (8,797.45 km) |
| Gallup to Ochsenhausen | 5,537.60 mi (8,911.91 km) |
| Gallup to Ochtrup | 5,255.07 mi (8,457.22 km) |
| Gallup to Odenthal | 5,305.97 mi (8,539.13 km) |
| Gallup to Oelde | 5,302.69 mi (8,533.86 km) |
| Gallup to Oelsnitz | 5,496.57 mi (8,845.87 km) |
| Gallup to Oer-Erkenschwick | 5,282.61 mi (8,501.55 km) |
