| Idaho Falls to Octeville | 4,758.28 mi (7,657.70 km) |
| Idaho Falls to Oignies | 4,864.35 mi (7,828.41 km) |
| Idaho Falls to Oissel | 4,860.20 mi (7,821.73 km) |
| Idaho Falls to Olivet | 4,958.79 mi (7,980.40 km) |
| Idaho Falls to Ollioules | 5,328.20 mi (8,574.91 km) |
| Idaho Falls to Olonne-sur-Mer | 4,901.13 mi (7,887.60 km) |
| Idaho Falls to Oloron-Sainte-Marie | 5,104.00 mi (8,214.10 km) |
| Idaho Falls to Onet Village | 5,156.45 mi (8,298.51 km) |
| Idaho Falls to Onnaing | 4,886.89 mi (7,864.69 km) |
| Idaho Falls to Orange | 5,242.14 mi (8,436.41 km) |
| Idaho Falls to Orchies | 4,871.75 mi (7,840.33 km) |
| Idaho Falls to Orleans | 4,957.15 mi (7,977.77 km) |
| Idaho Falls to Orly | 4,931.01 mi (7,935.70 km) |
| Idaho Falls to Ormesson-sur-Marne | 4,933.55 mi (7,939.78 km) |
| Idaho Falls to Orsay | 4,926.75 mi (7,928.83 km) |
