I have recently used the much underused and underated other International Airport of Glasgow at Prestwick. Although the airport is about 30miles from Glasgow the access is trouble free and reliable in the form of a train service and motorway both leading to Glasgow. It may be a bit of extra hassle getting to airport but while other airports may be suffering ice and snow it is a good bet that the runway at Prestwick will be open due to it's mild micro climate. The airport is mainly used by Ryanair and charter aircraft. The airport is under private ownership and not BAA like most other UK airports. The interior of the airport is old but it is efficient no crowds and every process from checking in to boarding is hassle free. There are bars and restaurants and even an observation balcony. All in all quite pleasant and much under utilsed by the major carriers.