| Altoona to Octeville | 3,632.80 mi (5,846.43 km) |
| Altoona to Oignies | 3,800.96 mi (6,117.06 km) |
| Altoona to Oissel | 3,753.90 mi (6,041.32 km) |
| Altoona to Olivet | 3,828.87 mi (6,161.97 km) |
| Altoona to Ollioules | 4,146.70 mi (6,673.47 km) |
| Altoona to Olonne-sur-Mer | 3,708.34 mi (5,968.00 km) |
| Altoona to Oloron-Sainte-Marie | 3,856.77 mi (6,206.88 km) |
| Altoona to Onet Village | 3,963.59 mi (6,378.78 km) |
| Altoona to Onnaing | 3,827.59 mi (6,159.91 km) |
| Altoona to Orange | 4,068.11 mi (6,546.99 km) |
| Altoona to Orchies | 3,810.92 mi (6,133.08 km) |
| Altoona to Orleans | 3,828.12 mi (6,160.77 km) |
| Altoona to Orly | 3,824.45 mi (6,154.86 km) |
| Altoona to Ormesson-sur-Marne | 3,829.31 mi (6,162.68 km) |
| Altoona to Orsay | 3,817.21 mi (6,143.20 km) |
