| Ardrossan to Octeville | 436.26 mi (702.09 km) |
| Ardrossan to Oignies | 481.93 mi (775.58 km) |
| Ardrossan to Oissel | 500.77 mi (805.91 km) |
| Ardrossan to Olivet | 608.67 mi (979.57 km) |
| Ardrossan to Ollioules | 985.41 mi (1,585.86 km) |
| Ardrossan to Olonne-sur-Mer | 642.73 mi (1,034.38 km) |
| Ardrossan to Oloron-Sainte-Marie | 880.23 mi (1,416.60 km) |
| Ardrossan to Onet Village | 844.58 mi (1,359.23 km) |
| Ardrossan to Onnaing | 503.30 mi (809.98 km) |
| Ardrossan to Orange | 900.97 mi (1,449.97 km) |
| Ardrossan to Orchies | 488.65 mi (786.40 km) |
| Ardrossan to Orleans | 606.44 mi (975.96 km) |
| Ardrossan to Orly | 565.28 mi (909.74 km) |
| Ardrossan to Ormesson-sur-Marne | 566.11 mi (911.06 km) |
| Ardrossan to Orsay | 563.45 mi (906.78 km) |
