| Pittsburgh to Ondokuzmayis | 5,504.48 mi (8,858.60 km) |
| Pittsburgh to Ordu | 5,594.62 mi (9,003.66 km) |
| Pittsburgh to Ortahisar | 5,602.09 mi (9,015.69 km) |
| Pittsburgh to Ortakent | 5,376.34 mi (8,652.38 km) |
| Pittsburgh to Ortaklar | 5,348.77 mi (8,608.02 km) |
| Pittsburgh to Ortakoy | 5,565.08 mi (8,956.13 km) |
| Pittsburgh to Ortakoy | 5,534.95 mi (8,907.64 km) |
| Pittsburgh to Osmaneli | 5,333.57 mi (8,583.55 km) |
| Pittsburgh to Osmaniye | 5,731.44 mi (9,223.87 km) |
| Pittsburgh to Ozdere | 5,327.50 mi (8,573.78 km) |
| Pittsburgh to Palu | 5,784.93 mi (9,309.95 km) |
| Pittsburgh to Pamukkale | 5,412.37 mi (8,710.37 km) |
| Pittsburgh to Patnos | 5,859.43 mi (9,429.84 km) |
| Pittsburgh to Pazar | 5,574.33 mi (8,971.01 km) |
| Pittsburgh to Pazarcik | 5,750.15 mi (9,253.97 km) |
