Originally Posted by krug

The main site I use for low cost carriers in Europe is www.skyscanner.net; www.easyjet.com is the main LCC option out of LGW (do avoid Ryanair unless you are very, very cost conscious...).

BA sale fares are in effect until tomorrow, Monday 23 January, so you might snag a bargain there, and you can upgrade at time of purchase to Club Europe for between $50-$100 each way (Terraces lounge access with free pour bar, champagne on request and free sandwiches, molton brown showers with freebies on request, wider seats in a 2-3 configuration (book side A-C), dedicated cabin, champagne in flight, proper tray service light meal, 40 tier point per sector and full BA Miles). Book at www.ba.com