British Airways‘ frequent flyer program Executive Club will reward you with double Avios on up to ten flights (= 10 single flight segments). You just have to register for the promotion, book your flights by December 13th and travel until June 30th, 2020.
Just follow this link to sign up for the offer:
Flights that have been booked between August 29th and September 18th (and therefor before registration was open) will still be considered for the promotion: Register your flights for double Avios
It’s essential to wait until you’ve registered before booking your flights! You won’t be rewarded with the bonus Avios for trips that have been purchased earlier.
In addition to all British Airways flights, you can earn bonus Avios on codeshare flight between Europe and North America with Iberia, Finnair or American Airlines. This time, also domestic flights within the UK with CityFlyer and within South Africa with Comair are also eligible.
Tip: You’re planning on flying more than 10 segments until the end of June? Then it might be better to use your Executive Club membership number only for long-haul flights. Have short connections credited to your account once the promotion is over!