| SeaTac to Nasaud | 5,591.38 mi (8,998.45 km) |
| SeaTac to Navodari | 5,854.33 mi (9,421.63 km) |
| SeaTac to Negresti-Oas | 5,536.48 mi (8,910.11 km) |
| SeaTac to Nehoiu | 5,748.61 mi (9,251.49 km) |
| SeaTac to Ocna Mures | 5,638.73 mi (9,074.67 km) |
| SeaTac to Odobesti | 5,734.78 mi (9,229.24 km) |
| SeaTac to Odorheiu Secuiesc | 5,669.28 mi (9,123.82 km) |
| SeaTac to Oltenita | 5,836.23 mi (9,392.50 km) |
| SeaTac to Onesti | 5,697.95 mi (9,169.97 km) |
| SeaTac to Oradea | 5,559.46 mi (8,947.09 km) |
| SeaTac to Orastie | 5,661.06 mi (9,110.59 km) |
| SeaTac to Oravita | 5,683.53 mi (9,146.76 km) |
| SeaTac to Orsova | 5,717.34 mi (9,201.17 km) |
| SeaTac to Otelu Rosu | 5,666.14 mi (9,118.77 km) |
| SeaTac to Otopeni | 5,796.38 mi (9,328.37 km) |
