| Katerini to Octeville | 1,337.70 mi (2,152.82 km) |
| Katerini to Oignies | 1,174.48 mi (1,890.15 km) |
| Katerini to Oissel | 1,216.20 mi (1,957.28 km) |
| Katerini to Olivet | 1,144.61 mi (1,842.07 km) |
| Katerini to Ollioules | 880.08 mi (1,416.35 km) |
| Katerini to Olonne-sur-Mer | 1,287.00 mi (2,071.23 km) |
| Katerini to Oloron-Sainte-Marie | 1,204.51 mi (1,938.48 km) |
| Katerini to Onet Village | 1,052.75 mi (1,694.23 km) |
| Katerini to Onnaing | 1,148.60 mi (1,848.49 km) |
| Katerini to Orange | 941.99 mi (1,515.98 km) |
| Katerini to Orchies | 1,165.09 mi (1,875.03 km) |
| Katerini to Orleans | 1,145.14 mi (1,842.93 km) |
| Katerini to Orly | 1,145.78 mi (1,843.96 km) |
| Katerini to Ormesson-sur-Marne | 1,140.85 mi (1,836.02 km) |
| Katerini to Orsay | 1,153.16 mi (1,855.83 km) |
