We always fly to or from London so I can visit family for a week. We book our own flight from or to London to or from wherever we are leaving from or arriving to in Europe. We pay a $150 deviation fee. If Silversea includes a flight from London to a European port they charge an arm and a leg. I was once quoted a $2,800 deviation fee when I could book a one way business class fare in the $400 range! We live in Florida and to book our own business class flights to Europe is in the $4500 range pp r/t. So for Europe we always use Silversea’s air department.