Collect 100% bonus Avios on your next six flights before 31 December 2019. This is a great offer, but as always with good offers there's a little catch behind ;).
You need to register first before booking, this means if you have already booked flights for 2019 this doesn't count, it is only for new bookings. But apart from that the offer is really good.
From BA Homepage:
What do you need to do?
Follow these simple steps to ensure that you make your 2019 even more rewarding:
- Simply take a moment to register – you must do this before booking
- Book your flights between 21 March and 19 April 2019
- Fly before 31 December 2019