| Pittsburgh to Nasaud | 4,809.95 mi (7,740.87 km) |
| Pittsburgh to Navodari | 5,096.52 mi (8,202.06 km) |
| Pittsburgh to Negresti-Oas | 4,748.95 mi (7,642.70 km) |
| Pittsburgh to Nehoiu | 4,964.23 mi (7,989.16 km) |
| Pittsburgh to Ocna Mures | 4,827.72 mi (7,769.46 km) |
| Pittsburgh to Odobesti | 4,974.16 mi (8,005.13 km) |
| Pittsburgh to Odorheiu Secuiesc | 4,884.79 mi (7,861.32 km) |
| Pittsburgh to Oltenita | 5,032.95 mi (8,099.75 km) |
| Pittsburgh to Onesti | 4,941.39 mi (7,952.41 km) |
| Pittsburgh to Oradea | 4,726.16 mi (7,606.02 km) |
| Pittsburgh to Orastie | 4,825.76 mi (7,766.32 km) |
| Pittsburgh to Oravita | 4,801.67 mi (7,727.55 km) |
| Pittsburgh to Orsova | 4,842.53 mi (7,793.30 km) |
| Pittsburgh to Otelu Rosu | 4,807.40 mi (7,736.76 km) |
| Pittsburgh to Otopeni | 4,990.91 mi (8,032.09 km) |
