| Pittsburgh to Rhondda | 3,579.56 mi (5,760.75 km) |
| Pittsburgh to Rhosllanerchrugog | 3,562.39 mi (5,733.12 km) |
| Pittsburgh to Rhyl | 3,538.77 mi (5,695.09 km) |
| Pittsburgh to Rhymney | 3,581.67 mi (5,764.14 km) |
| Pittsburgh to Richmond | 3,708.78 mi (5,968.71 km) |
| Pittsburgh to Rickmansworth | 3,697.57 mi (5,950.66 km) |
| Pittsburgh to Ripley | 3,625.99 mi (5,835.47 km) |
| Pittsburgh to Ripon | 3,596.48 mi (5,787.97 km) |
| Pittsburgh to Risca | 3,592.93 mi (5,782.27 km) |
| Pittsburgh to Rochdale | 3,583.71 mi (5,767.43 km) |
| Pittsburgh to Rochester | 3,742.89 mi (6,023.60 km) |
| Pittsburgh to Rock Ferry | 3,556.10 mi (5,722.99 km) |
| Pittsburgh to Rogerstone | 3,594.85 mi (5,785.35 km) |
| Pittsburgh to Romford | 3,724.90 mi (5,994.64 km) |
| Pittsburgh to Romsey | 3,672.44 mi (5,910.22 km) |
