How to ask for a seat upgrade on Iberia Flight?

After making the flight reservation, if you have not selected the seat, then the Airline will provide you the seat from the available one. If you are not comfortable with the assigned seating, then you can head with the IberiaAirlines seat upgrade economy to the business procedure; there are different ways through which you can proceed as there is online as well as offline service, amongst which you can pick any as per the preference, but before going further go through the Airline seat upgrade policy. Iberia Airline seat upgrade policy : Before proceeding with the seat upgrade procedure, go through the Iberia upgrade seat policy and thoroughly understand the terms and conditions by reading the points cited below. The seat upgrade process can be done until there are 4 hours left for the flight departure. The option to choose your seat for an upgrade will be provided to you from the vacant seat options. You can not upgrade your flight seat after you have received your boarding pas...