| North Little Rock to Oerlinghausen | 4,787.71 mi (7,705.07 km) |
| North Little Rock to Oestrich-Winkel | 4,831.76 mi (7,775.97 km) |
| North Little Rock to Offenburg | 4,883.49 mi (7,859.22 km) |
| North Little Rock to Oftersheim | 4,876.53 mi (7,848.01 km) |
| North Little Rock to Ohrdruf | 4,904.68 mi (7,893.31 km) |
| North Little Rock to Ohringen | 4,917.85 mi (7,914.52 km) |
| North Little Rock to Olbernhau | 5,006.06 mi (8,056.47 km) |
| North Little Rock to Olching | 5,024.86 mi (8,086.72 km) |
| North Little Rock to Oldenburg | 4,730.48 mi (7,612.97 km) |
| North Little Rock to Oldenburg in Holstein | 4,784.06 mi (7,699.20 km) |
| North Little Rock to Olfen | 4,748.94 mi (7,642.67 km) |
| North Little Rock to Olpe | 4,789.89 mi (7,708.58 km) |
| North Little Rock to Olsberg | 4,802.54 mi (7,728.95 km) |
| North Little Rock to Oranienburg | 4,922.78 mi (7,922.45 km) |
| North Little Rock to Ortenberg | 4,859.19 mi (7,820.12 km) |
