How amazing? How does $221 (each way) sound? You have till midnight tonight to book for trips starting on June 15th extending into fall.
Discounted fares are being offered in economy and premium economy.
Check out their birthday deals page for the exact breakdown of dates and rules, but remember to book soon!
As part of planning your trip to the UK, be sure to visit the Virgin/Visit Britain deals page, where you can book yourself a discounted hotel or tour.