Cheap flights to Seattle are available from just €296 when flying from Madrid! Further to our post of flights from Spain to Las Vegas for €283, Spanish travellers can also fly to the West Coast for a low price. Again, the prices we’ve seen for this route are for flights operated by OneWorld partner airlines. On most flights you flying with British Airways on at least one leg, though you may also be flying with American Airlines, Finnair or Iberia depending on the dates and times you choose. For fares this low, the departure date needs to be in early 2020. All prices are for a roundtrip and inclusive of taxes, fees and hand luggage. Hold luggage is available for an additional fee.