| College Park to Nuth | 3,914.28 mi (6,299.42 km) |
| College Park to Oegstgeest | 3,825.29 mi (6,156.21 km) |
| College Park to Oirschot | 3,875.64 mi (6,237.25 km) |
| College Park to Oisterwijk | 3,869.51 mi (6,227.38 km) |
| College Park to Oldebroek | 3,874.99 mi (6,236.19 km) |
| College Park to Oldenzaal | 3,918.84 mi (6,306.76 km) |
| College Park to Ommen | 3,893.46 mi (6,265.92 km) |
| College Park to Oosterend | 3,867.41 mi (6,223.99 km) |
| College Park to Oosterhout | 3,854.31 mi (6,202.91 km) |
| College Park to Oosterwolde | 3,876.45 mi (6,238.54 km) |
| College Park to Oostzaan | 3,835.53 mi (6,172.69 km) |
| College Park to Opmeer | 3,831.55 mi (6,166.29 km) |
| College Park to Oss | 3,877.40 mi (6,240.07 km) |
| College Park to Oud-Beijerland | 3,831.73 mi (6,166.58 km) |
| College Park to Oudenbosch | 3,842.37 mi (6,183.70 km) |
