Tickets can only be paid with credit or debit cards accepted by Iberia, through PayPal and Bizum, and by bank transfer through SOFORT:

• The following cards are accepted worldwide: Visa, Visa Electron, American Express, MasterCard, Maestro, UATP/Airplus and Diners Club.
  Certain countries also accept the following cards:
  UnionPay in the eurozone.
  Elo in Brazil.
  JCB in Japan.

• PayPal is available in some countries.

• SOFORT bank transfers are available in some European countries.

• Google Pay and Apple Pay in the eurozone, United States and United Kingdom.

• iDEAL bank transfers are available in the Netherlands.

• Bizum is only available in Spain.

• Payment in instalments, available in Spain and France.

• Mercado Pago, available in Argentina, Brazil, Chile, Colombia, Mexico and Peru as well as with these options:
  PIX in Brazil.
  PSE in Colombia.
  Debit in Chile.

• With Avios, sign in as an Iberia Plus member and choose the 'Discount with Avios' when you reach the payment page.

Remember, Iberia advises against the use of virtual cards to buy tickets.