Discount Tickets websites:
Red Flag Deals Online Forum (CA)
http://www.redflagdeals.com/
Priceline (US)
www.priceline.com
Vagabondo, Independant Travellers Website (IT, World)
Low Cost Flights
http://en.vagabondo.net/index.php/base/voli_basso_costo
Kayak (world)
www.kayak.com
Cheap Tickets
www.cheaptickets.com
Flying Hobos.com (world)
http://www.flyinghobos.com/
Discount Airlines:
ThompsonFly (UK)
http://www.thomsonfly.com/en/index.html
EasyJet (UK/Europe)
www.easyjet.com
RyanAir (UK/Europe)
http://www.ryanair.com/site/EN/
Other Air Travel Sites:
Sleeping in Airports (World)
http://www.sleepinginairports.net/