| Idaho Falls to Oberkirch | 5,117.15 mi (8,235.26 km) |
| Idaho Falls to Obernburg am Main | 5,079.60 mi (8,174.83 km) |
| Idaho Falls to Obernkirchen | 4,951.63 mi (7,968.88 km) |
| Idaho Falls to Oberschleissheim | 5,234.21 mi (8,423.65 km) |
| Idaho Falls to Oberstdorf | 5,241.90 mi (8,436.02 km) |
| Idaho Falls to Obertraubling | 5,212.52 mi (8,388.74 km) |
| Idaho Falls to Obertshausen | 5,058.80 mi (8,141.35 km) |
| Idaho Falls to Oberursel | 5,044.24 mi (8,117.92 km) |
| Idaho Falls to Ochsenfurt | 5,116.23 mi (8,233.78 km) |
| Idaho Falls to Ochsenhausen | 5,196.75 mi (8,363.37 km) |
| Idaho Falls to Ochtrup | 4,900.78 mi (7,887.05 km) |
| Idaho Falls to Odenthal | 4,958.91 mi (7,980.60 km) |
| Idaho Falls to Oelde | 4,947.14 mi (7,961.65 km) |
| Idaho Falls to Oelsnitz | 5,133.99 mi (8,262.36 km) |
| Idaho Falls to Oer-Erkenschwick | 4,931.45 mi (7,936.39 km) |
