| Pittsfield to Olivares | 3,479.07 mi (5,599.02 km) |
| Pittsfield to Olivenza | 3,392.79 mi (5,460.17 km) |
| Pittsfield to Olot | 3,730.84 mi (6,004.21 km) |
| Pittsfield to Onate | 3,481.43 mi (5,602.82 km) |
| Pittsfield to Onda | 3,676.37 mi (5,916.55 km) |
| Pittsfield to Onteniente | 3,697.91 mi (5,951.20 km) |
| Pittsfield to Orihuela | 3,706.53 mi (5,965.08 km) |
| Pittsfield to Osuna | 3,535.89 mi (5,690.46 km) |
| Pittsfield to Ourense | 3,249.27 mi (5,229.19 km) |
| Pittsfield to Oviedo | 3,314.81 mi (5,334.68 km) |
| Pittsfield to Paiporta | 3,686.70 mi (5,933.18 km) |
| Pittsfield to Pajara | 3,399.53 mi (5,471.02 km) |
| Pittsfield to Palafolls | 3,759.40 mi (6,050.17 km) |
| Pittsfield to Palafrugell | 3,769.97 mi (6,067.18 km) |
| Pittsfield to Palamos | 3,770.77 mi (6,068.47 km) |
