For the cheapest and easiest options, you'd probably want to look at a package. Thomas Cook are offering some special deals for Turkey this weekend, so there may be a good place to start. The packages will also usually include transfers, so that sorts out a part of the journey that can often be expensive if you do it seperately.

Otherwise, you could try Olympic Holidays, Thomson, First Choice or Goldtrail.

Portland have good deals to Turkey and give you the web price when you phone them.

We have been going to this area twice a year for many years and have used package holidays but also travelled independently. It often depends on when you are going, at the moment there are some very good prices on http://www.thomascook.co.uk/ for May, less than the price of a flight (£223 from Manchester to Hisaronu last night). It is always the first place I look and is usually the cheapest, reputable hotels too. I have booked with them last year and three years ago and got very good deals and have had no problems whatsoever.

Most of the time I use http://www.travelrepublic.co.uk/ and have saved quite a bit of money on some trips, it is also a very easy to use website for first timers. I assume you will be sharing a room with your friend, if not it is well worth considering independent booking as single supplements put a massive amount on package holidays yet sometimes do not affect hotels booked direct.

I have just booked my daughters holiday in Hisaronu for May through TravelRepublic, it was slightly cheaper through Thomas Cook but she wanted daytime flights and a private transfer from the airport and eventually decided to go half board as it was only a couple of pounds more and we know the food is good as we have been there many times. Private transfers are reliable and easily arranged costing £30 each return.

travel republic was good for deals last year or maybe goldtrail or even icelolly i have alot of flight company's on my website to if you need them
john