The only U.K. direct flight is from London City and prices are usually astronomical.
If you are in the north west, it’s not that difficult as there are regular flights to Barcelona and Palma, then to Ibz from there. If you are in Yorkshire or the north east and have can’t get to Mcr, it is more difficult due to the scarcity of winter flights to Barcelona or Palma. If you need to fly from Yorkshire or the north east, you might want to consider flying to Malaga as there are more flights available, then to Ibz from there, but it’s obviously further away.