Originally Posted by
Cymro
(NB flying out of the EU really is not about lower departure taxes, though it plays a role.
In all the calculations I've done to compare the savings between an ex-EU and an ex-LHR the APD element is approx 15-25% of the difference between the two fares - the rest being made up of minor difference in airport fees and the bulk in the reduced base fare and surcharges.