How do I book and manage a Companion Voucher booking?

Log in to your British Airways Club account, search for Reward Flights using Avios, select your destination and dates, ensure your Companion Voucher is selected, and complete the booking. The voucher holder must travel, bookings are subject to Reward Flight availability, vouchers cannot be used on cash bookings, and the outbound flight must depart on or before the voucher expiry date. You can take a companion for no additional Avios or receive a 50% Avios discount when travelling solo. Travel dates can be changed subject to Reward Flight availability for £35 per person plus any difference in Avios and taxes. Contact British Airways directly for upgrades, destination changes, passenger removals or adding infants.