| Pittsburgh to Collegno | 4,226.18 mi (6,801.38 km) |
| Pittsburgh to Cologno al Serio | 4,297.91 mi (6,916.82 km) |
| Pittsburgh to Cologno Monzese | 4,282.26 mi (6,891.63 km) |
| Pittsburgh to Colorno | 4,349.52 mi (6,999.87 km) |
| Pittsburgh to Comacchio | 4,432.98 mi (7,134.20 km) |
| Pittsburgh to Comiso | 4,839.21 mi (7,787.95 km) |
| Pittsburgh to Como | 4,264.42 mi (6,862.92 km) |
| Pittsburgh to Concordia Sagittaria | 4,421.05 mi (7,114.99 km) |
| Pittsburgh to Concorezzo | 4,282.52 mi (6,892.06 km) |
| Pittsburgh to Conegliano | 4,394.10 mi (7,071.62 km) |
| Pittsburgh to Conselice | 4,425.19 mi (7,121.65 km) |
| Pittsburgh to Conselve | 4,400.28 mi (7,081.57 km) |
| Pittsburgh to Conversano | 4,784.66 mi (7,700.16 km) |
| Pittsburgh to Copertino | 4,852.77 mi (7,809.78 km) |
| Pittsburgh to Copparo | 4,411.10 mi (7,098.98 km) |
