Flights:
You can find cheap flights right here... with some luck of course :-)
http://www.ryanair.com/
5 vor 12 - Last Minute Reisen
Lastminute.de
www.flug.de
www.tap-airportugal.de
www.ebookers.com
Flysmart
Opodo
TUI.de
Cheapflights Skyscanner