Additional information:
https://help.vueling.com/hc/en-gb/articles/19798818911505-Flight-Credit
1.1. Go to vueling.com or our app and select a new flight.
1.2. At the end of the process, on the payment page, you will see the Flight Credit section. Once you fill in the details, you will be able to see your current balance.
If the price of the booking is lower than your credit balance, the difference will be saved for future bookings.
If the total price of the booking is higher than your credit balance, you can pay the difference by card.