| SeaTac to Noventa Vicentina | 5,445.93 mi (8,764.39 km) |
| SeaTac to Novi di Modena | 5,453.85 mi (8,777.12 km) |
| SeaTac to Novi Ligure | 5,408.79 mi (8,704.61 km) |
| SeaTac to Nuoro | 5,686.24 mi (9,151.11 km) |
| SeaTac to Occhiobello | 5,468.78 mi (8,801.16 km) |
| SeaTac to Oderzo | 5,438.95 mi (8,753.14 km) |
| SeaTac to Oggiono | 5,362.55 mi (8,630.19 km) |
| SeaTac to Olbia | 5,655.03 mi (9,100.88 km) |
| SeaTac to Oleggio | 5,355.37 mi (8,618.63 km) |
| SeaTac to Olgiate Comasco | 5,352.97 mi (8,614.77 km) |
| SeaTac to Olgiate Olona | 5,359.72 mi (8,625.63 km) |
| SeaTac to Omegna | 5,333.28 mi (8,583.09 km) |
| SeaTac to Opera | 5,382.86 mi (8,662.88 km) |
| SeaTac to Oppeano | 5,436.45 mi (8,749.12 km) |
| SeaTac to Orbassano | 5,362.05 mi (8,629.38 km) |
