| Idaho Falls to Oerlinghausen | 4,954.72 mi (7,973.85 km) |
| Idaho Falls to Oestrich-Winkel | 5,038.11 mi (8,108.05 km) |
| Idaho Falls to Offenburg | 5,116.15 mi (8,233.65 km) |
| Idaho Falls to Oftersheim | 5,088.10 mi (8,188.51 km) |
| Idaho Falls to Ohrdruf | 5,072.32 mi (8,163.11 km) |
| Idaho Falls to Ohringen | 5,123.77 mi (8,245.91 km) |
| Idaho Falls to Olbernhau | 5,152.10 mi (8,291.50 km) |
| Idaho Falls to Olching | 5,229.72 mi (8,416.43 km) |
| Idaho Falls to Oldenburg | 4,881.10 mi (7,855.36 km) |
| Idaho Falls to Oldenburg in Holstein | 4,892.17 mi (7,873.18 km) |
| Idaho Falls to Olfen | 4,931.40 mi (7,936.32 km) |
| Idaho Falls to Olpe | 4,980.45 mi (8,015.26 km) |
| Idaho Falls to Olsberg | 4,981.68 mi (8,017.24 km) |
| Idaho Falls to Oranienburg | 5,036.01 mi (8,104.67 km) |
| Idaho Falls to Ortenberg | 5,050.00 mi (8,127.19 km) |
