The airline will extend its web check-in service from 19 March to passengers travelling with checked baggage and reduced mobility customers.
Customers who check-in with only carry-on baggage will not be charged, but those with baggage to be checked in will pay a €5 fee.
However, from 1 May all passengers checking in online will be charged a €5 fee, except for promotional fares.
Passengers continuing to use check-in desks will be charged €10 per person from 19 March, and then €20 per person from 1 May, as check-in desks are phased out over the summer.
From 1 October, passengers who have checked in bags will use the airport 'bag-drop' desks.
The airline says the move is a first for the industry and will allow it to lower airport and handling costs.
