| Security-Widefield to Oberkirch | 5,140.57 mi (8,272.95 km) |
| Security-Widefield to Obernburg am Main | 5,115.82 mi (8,233.12 km) |
| Security-Widefield to Obernkirchen | 5,003.24 mi (8,051.93 km) |
| Security-Widefield to Oberschleissheim | 5,271.06 mi (8,482.96 km) |
| Security-Widefield to Oberstdorf | 5,267.90 mi (8,477.86 km) |
| Security-Widefield to Obertraubling | 5,256.35 mi (8,459.27 km) |
| Security-Widefield to Obertshausen | 5,095.16 mi (8,199.87 km) |
| Security-Widefield to Oberursel | 5,080.41 mi (8,176.12 km) |
| Security-Widefield to Ochsenfurt | 5,155.17 mi (8,296.45 km) |
| Security-Widefield to Ochsenhausen | 5,225.37 mi (8,409.43 km) |
| Security-Widefield to Ochtrup | 4,944.36 mi (7,957.18 km) |
| Security-Widefield to Odenthal | 4,994.47 mi (8,037.83 km) |
| Security-Widefield to Oelde | 4,992.08 mi (8,033.98 km) |
| Security-Widefield to Oelsnitz | 5,186.59 mi (8,347.02 km) |
| Security-Widefield to Oer-Erkenschwick | 4,971.55 mi (8,000.93 km) |
