| SeaTac to Olivares | 5,377.36 mi (8,654.02 km) |
| SeaTac to Olivenza | 5,276.59 mi (8,491.84 km) |
| SeaTac to Olot | 5,386.05 mi (8,668.01 km) |
| SeaTac to Onate | 5,191.93 mi (8,355.60 km) |
| SeaTac to Onda | 5,428.69 mi (8,736.63 km) |
| SeaTac to Onteniente | 5,481.84 mi (8,822.18 km) |
| SeaTac to Orihuela | 5,512.30 mi (8,871.19 km) |
| SeaTac to Osuna | 5,422.95 mi (8,727.39 km) |
| SeaTac to Ourense | 5,056.53 mi (8,137.69 km) |
| SeaTac to Oviedo | 5,067.24 mi (8,154.94 km) |
| SeaTac to Paiporta | 5,453.85 mi (8,777.12 km) |
| SeaTac to Pajara | 5,566.60 mi (8,958.58 km) |
| SeaTac to Palafolls | 5,422.88 mi (8,727.28 km) |
| SeaTac to Palafrugell | 5,420.69 mi (8,723.75 km) |
| SeaTac to Palamos | 5,423.79 mi (8,728.74 km) |
