| Pittsburg to Noventa Vicentina | 5,994.23 mi (9,646.78 km) |
| Pittsburg to Novi di Modena | 5,998.48 mi (9,653.63 km) |
| Pittsburg to Novi Ligure | 5,944.92 mi (9,567.43 km) |
| Pittsburg to Nuoro | 6,208.12 mi (9,991.00 km) |
| Pittsburg to Occhiobello | 6,016.05 mi (9,681.90 km) |
| Pittsburg to Oderzo | 5,992.35 mi (9,643.76 km) |
| Pittsburg to Oggiono | 5,904.50 mi (9,502.38 km) |
| Pittsburg to Olbia | 6,179.87 mi (9,945.54 km) |
| Pittsburg to Oleggio | 5,893.99 mi (9,485.46 km) |
| Pittsburg to Olgiate Comasco | 5,893.50 mi (9,484.67 km) |
| Pittsburg to Olgiate Olona | 5,899.39 mi (9,494.16 km) |
| Pittsburg to Omegna | 5,872.08 mi (9,450.19 km) |
| Pittsburg to Opera | 5,922.89 mi (9,531.97 km) |
| Pittsburg to Oppeano | 5,983.51 mi (9,629.52 km) |
| Pittsburg to Orbassano | 5,894.30 mi (9,485.97 km) |
