| Markham to Olivares | 4,187.61 mi (6,739.31 km) |
| Markham to Olivenza | 4,097.76 mi (6,594.71 km) |
| Markham to Olot | 4,396.77 mi (7,075.91 km) |
| Markham to Onate | 4,154.20 mi (6,685.54 km) |
| Markham to Onda | 4,360.98 mi (7,018.32 km) |
| Markham to Onteniente | 4,388.89 mi (7,063.24 km) |
| Markham to Orihuela | 4,401.69 mi (7,083.84 km) |
| Markham to Osuna | 4,243.20 mi (6,828.78 km) |
| Markham to Ourense | 3,937.68 mi (6,337.09 km) |
| Markham to Oviedo | 3,993.21 mi (6,426.45 km) |
| Markham to Paiporta | 4,374.34 mi (7,039.82 km) |
| Markham to Pajara | 4,140.17 mi (6,662.96 km) |
| Markham to Palafolls | 4,427.58 mi (7,125.50 km) |
| Markham to Palafrugell | 4,435.69 mi (7,138.56 km) |
| Markham to Palamos | 4,436.99 mi (7,140.64 km) |
