ZED-ID90
It is true that some portions to and from Europe are "heavy" on Taxes, and as the taxes are in € the exchange rate is taking a share as well.
I had cases where the ZED Fare was higher then the ID90 as the trip was not far, usualy less then one hour to fly but due to the arrangements there was only ZED available and not ID90.
I am still missing the old days where you could ride with your valid licence on a jumpseat on the given day, Aviation was great at that time. Spain is still a option for that. In UK you cant even think about it, it would be a offense.