You can use an eVoucher to pay for flights. You can’t currently use it to pay for a BA Holidays booking online or extras, such as seating or baggage.
You can use an eVoucher on any British Airways marketed route with a BA flight number, apart from bookings on Sun-Air.
When using the eVoucher you’ll need the eVoucher number as well as the registered surname and email address.
You can apply up to four eVouchers per booking. However, eVouchers issued directly from BA Customer Relations team can’t be combined with any other eVoucher.