| Pittsburgh to Orthez | 3,913.82 mi (6,298.69 km) |
| Pittsburgh to Orvault | 3,765.45 mi (6,059.91 km) |
| Pittsburgh to Osny | 3,869.89 mi (6,227.98 km) |
| Pittsburgh to Ostwald | 4,115.83 mi (6,623.78 km) |
| Pittsburgh to Ouistreham | 3,767.87 mi (6,063.80 km) |
| Pittsburgh to Oullins | 4,087.50 mi (6,578.19 km) |
| Pittsburgh to Outreau | 3,804.65 mi (6,123.00 km) |
| Pittsburgh to Oyonnax | 4,105.77 mi (6,607.59 km) |
| Pittsburgh to Ozoir-la-Ferriere | 3,903.49 mi (6,282.07 km) |
| Pittsburgh to Pace | 3,734.97 mi (6,010.86 km) |
| Pittsburgh to Palaiseau | 3,887.42 mi (6,256.20 km) |
| Pittsburgh to Pamiers | 4,032.09 mi (6,489.02 km) |
| Pittsburgh to Panazol | 3,933.51 mi (6,330.37 km) |
| Pittsburgh to Pantin | 3,888.56 mi (6,258.03 km) |
| Pittsburgh to Paray-le-Monial | 4,034.65 mi (6,493.14 km) |
