| Pittsburg to Nuth | 5,526.81 mi (8,894.54 km) |
| Pittsburg to Oegstgeest | 5,420.62 mi (8,723.64 km) |
| Pittsburg to Oirschot | 5,479.65 mi (8,818.64 km) |
| Pittsburg to Oisterwijk | 5,472.48 mi (8,807.10 km) |
| Pittsburg to Oldebroek | 5,445.29 mi (8,763.34 km) |
| Pittsburg to Oldenzaal | 5,479.88 mi (8,819.01 km) |
| Pittsburg to Ommen | 5,455.46 mi (8,779.72 km) |
| Pittsburg to Oosterend | 5,420.13 mi (8,722.86 km) |
| Pittsburg to Oosterhout | 5,459.87 mi (8,786.80 km) |
| Pittsburg to Oosterwolde | 5,426.77 mi (8,733.53 km) |
| Pittsburg to Oostzaan | 5,418.80 mi (8,720.71 km) |
| Pittsburg to Opmeer | 5,406.50 mi (8,700.93 km) |
| Pittsburg to Oss | 5,471.38 mi (8,805.34 km) |
| Pittsburg to Oud-Beijerland | 5,438.09 mi (8,751.75 km) |
| Pittsburg to Oudenbosch | 5,453.51 mi (8,776.57 km) |
