| Barberton to Nuth | 4,006.06 mi (6,447.13 km) |
| Barberton to Oegstgeest | 3,912.59 mi (6,296.71 km) |
| Barberton to Oirschot | 3,965.31 mi (6,381.55 km) |
| Barberton to Oisterwijk | 3,958.90 mi (6,371.23 km) |
| Barberton to Oldebroek | 3,958.92 mi (6,371.26 km) |
| Barberton to Oldenzaal | 4,001.98 mi (6,440.56 km) |
| Barberton to Ommen | 3,976.31 mi (6,399.26 km) |
| Barberton to Oosterend | 3,948.23 mi (6,354.07 km) |
| Barberton to Oosterhout | 3,943.87 mi (6,347.04 km) |
| Barberton to Oosterwolde | 3,957.03 mi (6,368.23 km) |
| Barberton to Oostzaan | 3,920.96 mi (6,310.18 km) |
| Barberton to Opmeer | 3,915.49 mi (6,301.38 km) |
| Barberton to Oss | 3,965.39 mi (6,381.68 km) |
| Barberton to Oud-Beijerland | 3,921.04 mi (6,310.30 km) |
| Barberton to Oudenbosch | 3,932.68 mi (6,329.04 km) |
