| McKeesport to Olivares | 3,849.59 mi (6,195.31 km) |
| McKeesport to Olivenza | 3,763.55 mi (6,056.85 km) |
| McKeesport to Olot | 4,099.55 mi (6,597.59 km) |
| McKeesport to Onate | 3,850.83 mi (6,197.31 km) |
| McKeesport to Onda | 4,046.87 mi (6,512.81 km) |
| McKeesport to Onteniente | 4,068.72 mi (6,547.98 km) |
| McKeesport to Orihuela | 4,077.44 mi (6,562.01 km) |
| McKeesport to Osuna | 3,906.49 mi (6,286.88 km) |
| McKeesport to Ourense | 3,619.90 mi (5,825.67 km) |
| McKeesport to Oviedo | 3,684.72 mi (5,929.98 km) |
| McKeesport to Paiporta | 4,057.38 mi (6,529.72 km) |
| McKeesport to Pajara | 3,754.59 mi (6,042.42 km) |
| McKeesport to Palafolls | 4,128.40 mi (6,644.01 km) |
| McKeesport to Palafrugell | 4,138.67 mi (6,660.55 km) |
| McKeesport to Palamos | 4,139.53 mi (6,661.94 km) |
