| McHenry to Olivares | 4,193.50 mi (6,748.79 km) |
| McHenry to Olivenza | 4,102.84 mi (6,602.88 km) |
| McHenry to Olot | 4,393.70 mi (7,070.97 km) |
| McHenry to Onate | 4,152.58 mi (6,682.93 km) |
| McHenry to Onda | 4,361.41 mi (7,019.00 km) |
| McHenry to Onteniente | 4,390.60 mi (7,065.98 km) |
| McHenry to Orihuela | 4,404.27 mi (7,088.00 km) |
| McHenry to Osuna | 4,248.74 mi (6,837.69 km) |
| McHenry to Ourense | 3,939.26 mi (6,339.62 km) |
| McHenry to Oviedo | 3,992.78 mi (6,425.77 km) |
| McHenry to Paiporta | 4,375.36 mi (7,041.46 km) |
| McHenry to Pajara | 4,159.21 mi (6,693.60 km) |
| McHenry to Palafolls | 4,424.88 mi (7,121.15 km) |
| McHenry to Palafrugell | 4,432.55 mi (7,133.51 km) |
| McHenry to Palamos | 4,433.93 mi (7,135.73 km) |
