Sabre flies from Gatwick to Preveza airport on the mainland. From there, if you are headed for Galini it is a 45 minute bus ride to the island of Levkas, which is connected to the mainland by road. For Vounaki, on the mainland, it is a 30 minute bus ride.
Galini: from £409 sterling in May, to £770 sterling in July per adult for one week.
Vounaki: from £359 sterling in April, to £780 sterling in July per adult for one week. Reduced rates for children.