| Riga to Octeville | 1,168.33 mi (1,880.25 km) |
| Riga to Oignies | 967.08 mi (1,556.36 km) |
| Riga to Oissel | 1,081.49 mi (1,740.50 km) |
| Riga to Olivet | 1,118.97 mi (1,800.81 km) |
| Riga to Ollioules | 1,243.68 mi (2,001.52 km) |
| Riga to Olonne-sur-Mer | 1,308.03 mi (2,105.08 km) |
| Riga to Oloron-Sainte-Marie | 1,436.24 mi (2,311.40 km) |
| Riga to Onet Village | 1,272.04 mi (2,047.14 km) |
| Riga to Onnaing | 948.87 mi (1,527.06 km) |
| Riga to Orange | 1,216.98 mi (1,958.53 km) |
| Riga to Orchies | 957.91 mi (1,541.61 km) |
| Riga to Orleans | 1,116.89 mi (1,797.46 km) |
| Riga to Orly | 1,061.80 mi (1,708.80 km) |
| Riga to Ormesson-sur-Marne | 1,054.88 mi (1,697.66 km) |
| Riga to Orsay | 1,070.98 mi (1,723.57 km) |
