| SeaTac to Octeville | 4,854.21 mi (7,812.09 km) |
| SeaTac to Oignies | 4,931.24 mi (7,936.06 km) |
| SeaTac to Oissel | 4,944.33 mi (7,957.13 km) |
| SeaTac to Olivet | 5,048.60 mi (8,124.93 km) |
| SeaTac to Ollioules | 5,425.83 mi (8,732.03 km) |
| SeaTac to Olonne-sur-Mer | 5,019.07 mi (8,077.40 km) |
| SeaTac to Oloron-Sainte-Marie | 5,237.83 mi (8,429.47 km) |
| SeaTac to Onet Village | 5,265.04 mi (8,473.27 km) |
| SeaTac to Onnaing | 4,951.25 mi (7,968.26 km) |
| SeaTac to Orange | 5,339.68 mi (8,593.38 km) |
| SeaTac to Orchies | 4,937.33 mi (7,945.87 km) |
| SeaTac to Orleans | 5,046.66 mi (8,121.81 km) |
| SeaTac to Orly | 5,012.44 mi (8,066.74 km) |
| SeaTac to Ormesson-sur-Marne | 5,013.94 mi (8,069.16 km) |
| SeaTac to Orsay | 5,009.54 mi (8,062.08 km) |
