Iberia maintains agreements with other airlines through which it sells seats on certain routes operated by those airlines under the IB code. These flights are referred to as 'code share flights' and are only eligible for Avios* if operated by a oneworld alliance airline.

If you bought your ticket through iberia.com and the operator is American Airlines, British Airways, Finnair or Vueling, we'll redirect you to their website so you can check in online. If the operator is another airline, you will have to check in at the airport.
Your ticket will state the free checked baggage included in your baggage allowance. For excess weight, additional bags and similar, the baggage regulations of the operating airline will apply.

*Bear in mind that, However, with the exception of Vueling and Level, you can't use Avios to buy tickets for these flights.