Online Flight Search Facilities

Each of these services search several or all of the airlines for the best fares:

www.go2serve.com
www.cheapflights.co.uk
www.dealchecker.co.uk
www.expedia.co.uk
jacksflightclub.com
www.kayak.co.uk
http://matrix.itasoftware.com
www.netflights.com
www.opodo.co.uk
www.skyscanner.net