| Grand Forks to Nuth | 4,230.56 mi (6,808.42 km) |
| Grand Forks to Oegstgeest | 4,127.13 mi (6,641.97 km) |
| Grand Forks to Oirschot | 4,184.93 mi (6,734.99 km) |
| Grand Forks to Oisterwijk | 4,177.90 mi (6,723.68 km) |
| Grand Forks to Oldebroek | 4,160.86 mi (6,696.25 km) |
| Grand Forks to Oldenzaal | 4,199.59 mi (6,758.58 km) |
| Grand Forks to Ommen | 4,174.14 mi (6,717.63 km) |
| Grand Forks to Oosterend | 4,140.94 mi (6,664.20 km) |
| Grand Forks to Oosterhout | 4,164.09 mi (6,701.45 km) |
| Grand Forks to Oosterwolde | 4,148.59 mi (6,676.52 km) |
| Grand Forks to Oostzaan | 4,129.26 mi (6,645.40 km) |
| Grand Forks to Opmeer | 4,119.39 mi (6,629.52 km) |
| Grand Forks to Oss | 4,179.75 mi (6,726.66 km) |
| Grand Forks to Oud-Beijerland | 4,141.45 mi (6,665.02 km) |
| Grand Forks to Oudenbosch | 4,155.73 mi (6,688.00 km) |
