http://google.co.uk/flights http://kayak.com/explore http://skyscanner.net just a few websites where you may be able to find some cheap deals. Prices at time of writing this range from £171 up to whatever you want to pay with the average seeming to be in the £200-£300 range. Flights from Aberdeen to Bucharest via Amsterdam seem to be the most popular and there is more discussion in here.