| McDonough to Olivares | 4,269.66 mi (6,871.36 km) |
| McDonough to Olivenza | 4,189.27 mi (6,741.98 km) |
| McDonough to Olot | 4,562.15 mi (7,342.07 km) |
| McDonough to Onate | 4,309.39 mi (6,935.29 km) |
| McDonough to Onda | 4,493.54 mi (7,231.65 km) |
| McDonough to Onteniente | 4,508.73 mi (7,256.09 km) |
| McDonough to Orihuela | 4,512.78 mi (7,262.61 km) |
| McDonough to Osuna | 4,327.82 mi (6,964.96 km) |
| McDonough to Ourense | 4,065.80 mi (6,543.28 km) |
| McDonough to Oviedo | 4,139.56 mi (6,661.98 km) |
| McDonough to Paiporta | 4,500.96 mi (7,243.60 km) |
| McDonough to Pajara | 4,089.42 mi (6,581.28 km) |
| McDonough to Palafolls | 4,589.05 mi (7,385.37 km) |
| McDonough to Palafrugell | 4,601.21 mi (7,404.93 km) |
| McDonough to Palamos | 4,601.68 mi (7,405.69 km) |
