It is important to note that these rates apply if one wants to choose a seat at the time of buying the ticket, but that it's a free service if one looks for their preferred seat at the time of check-in, either online, at a self-check-in machine or with an employee at an airport counter.
Although it may be a novelty for the British airline, those of us who have traveled with Aer Lingus know that this has been happening with the green clover line since May 23, 2007.
Thus, on short-haul flights (and depending on the Airbus model in which we travel), choosing a row from 1 to 5, a seat next to an exit or opting for any of the remaining rows means paying a minimum of 3 euros until 80 of a Premium armchair (which is still a Premier class seat that has not been removed from an apparatus in which the tourist class has been unified: more comfort, equal service). Anyway, if our rate is Flexifare / Flexible, the seat reservation is free.
For long-haul (Transatlantic) flights the service is free, except on the Orlando route, where you can only book the aforementioned “Premium” by between 275 and 325 euros.
With these prices, I am not surprised by the races that take place on EasyJet and Ryanair flights after those with Priority Boarding have embarked to get a place with the best views, the lowest noise, the largest space between seats or, simply, no partners for that to lie comfortably.
The full British Airways release (in English) and the full list of Aer Lingus fees