| Pittsburgh to Redondela | 3,589.23 mi (5,776.31 km) |
| Pittsburgh to Reinosa | 3,775.95 mi (6,076.80 km) |
| Pittsburgh to Requena | 4,026.56 mi (6,480.13 km) |
| Pittsburgh to Reus | 4,073.55 mi (6,555.74 km) |
| Pittsburgh to Rianxo | 3,569.78 mi (5,745.00 km) |
| Pittsburgh to Ribadeo | 3,627.78 mi (5,838.34 km) |
| Pittsburgh to Rincon de la Victoria | 3,966.93 mi (6,384.16 km) |
| Pittsburgh to Ripoll | 4,087.93 mi (6,578.89 km) |
| Pittsburgh to Ripollet | 4,109.86 mi (6,614.17 km) |
| Pittsburgh to Rojales | 4,091.25 mi (6,584.23 km) |
| Pittsburgh to Ronda | 3,923.46 mi (6,314.20 km) |
| Pittsburgh to Roquetas de Mar | 4,045.97 mi (6,511.36 km) |
| Pittsburgh to Rosas | 4,130.01 mi (6,646.60 km) |
| Pittsburgh to Rubi | 4,104.32 mi (6,605.26 km) |
| Pittsburgh to Rute | 3,942.96 mi (6,345.58 km) |
