Through June 29, members of the AARP (anyone that can pay $12 today for a membership) can book roundtrip, transatlantic cash tickets on British Airways discounted up to $400. Departure date of the flight must be between the window of August 1, 2017 and January 8, 2018. No open-jaw flights are permitted. Origin and destination must be the same.

The discount depends on the cabin class booked.

And no, you don't have to be any specific age to join the AARP.