| Glenmont to Olivares | 3,745.82 mi (6,028.32 km) |
| Glenmont to Olivenza | 3,662.22 mi (5,893.77 km) |
| Glenmont to Olot | 4,017.73 mi (6,465.91 km) |
| Glenmont to Onate | 3,766.45 mi (6,061.51 km) |
| Glenmont to Onda | 3,956.09 mi (6,366.70 km) |
| Glenmont to Onteniente | 3,974.54 mi (6,396.40 km) |
| Glenmont to Orihuela | 3,980.96 mi (6,406.74 km) |
| Glenmont to Osuna | 3,803.34 mi (6,120.89 km) |
| Glenmont to Ourense | 3,528.32 mi (5,678.28 km) |
| Glenmont to Oviedo | 3,598.07 mi (5,790.54 km) |
| Glenmont to Paiporta | 3,965.00 mi (6,381.05 km) |
| Glenmont to Pajara | 3,620.98 mi (5,827.40 km) |
| Glenmont to Palafolls | 4,045.45 mi (6,510.52 km) |
| Glenmont to Palafrugell | 4,056.84 mi (6,528.85 km) |
| Glenmont to Palamos | 4,057.47 mi (6,529.87 km) |
