We've recently discovered what looks like an excellent on-line travel agency offering cheap flights from the UK to Dalaman.
Flightline.co.uk, a leading UK travel agent since 1989, provides cheap flights, holidays, accommodation and holiday extras at the lowest possible prices. Using their web site, you can compare prices on hundreds of different airlines departing UK airports and over 150,000 hotels worldwide, not to mention car hire, transfers, parking, insurance and more. They are also ABTA members & ATOL bonded.