| Knightdale to Nuth | 4,127.08 mi (6,641.89 km) |
| Knightdale to Oegstgeest | 4,039.95 mi (6,501.67 km) |
| Knightdale to Oirschot | 4,089.33 mi (6,581.14 km) |
| Knightdale to Oisterwijk | 4,083.32 mi (6,571.46 km) |
| Knightdale to Oldebroek | 4,090.81 mi (6,583.52 km) |
| Knightdale to Oldenzaal | 4,134.87 mi (6,654.42 km) |
| Knightdale to Ommen | 4,109.63 mi (6,613.82 km) |
| Knightdale to Oosterend | 4,084.34 mi (6,573.12 km) |
| Knightdale to Oosterhout | 4,068.07 mi (6,546.92 km) |
| Knightdale to Oosterwolde | 4,093.46 mi (6,587.78 km) |
| Knightdale to Oostzaan | 4,050.87 mi (6,519.25 km) |
| Knightdale to Opmeer | 4,047.44 mi (6,513.72 km) |
| Knightdale to Oss | 4,091.72 mi (6,584.98 km) |
| Knightdale to Oud-Beijerland | 4,045.63 mi (6,510.81 km) |
| Knightdale to Oudenbosch | 4,055.87 mi (6,527.29 km) |
