If you're already signed up to the Iberia Express rewards program, Iberia Plus, you may be able to collect points when booking your airline tickets with Expedia. Look for the name of the loyalty program and then enter your membership number at the final stages of booking to check if your flight is eligible for mileage. You can also accumulate points through credit card purchases and flying with the airline with Iberia Plus. When you book with Expedia, you can earn OneKeyCash™* on top of your airline miles. Just join One Key™, our free travel rewards program, to get started. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.