There are two International airports that serve Orlando, Orlando International Airport and Sanford Airport.
Sandford Airport
The charter airlines fly into Sanford and tend to be much cheaper, we have found flights for as low as £160 return into Sandford Airport, check out:
http://www.firstchoice.co.uk http://www.thomsonfly.com http://www.flymonarch.com http://www.flythomascook.com http://www.xl.com http://www.mytravel.co.uk
Orlando International Airport
Flights into OIA are usually more expensive and may include stop(s) along the way, airlines serving OIA from the UK include: http://www.virginatlantic.com http://www.continental.com http://www.BA.com http://www.flybmi.com
Pick up/drop off is available at both airports and is included in the package prices.