After a tumultuous year of holiday and flight cancellations, millions of people are still holding onto airline vouchers.
But with travel abroad not legally permitted until at least 17 May - possibly longer - some vouchers are close to expiring and many people now want a refund.
In some instances, the airline has ended the route from the airport the passenger was due to fly from or the destination they were supposed to fly to.
But what can you do if your voucher is about to run out? Find out below.
It depends. If you accepted this voucher last year and were given no option for a refund, or you were misled into accepting it, you could dispute it. First, approach your airline and explain the situation, and why you want a refund. If it refuses, you can take your complaint to alternative dispute resolution. It's free in most instances, and this.
If you were offered a refund at the time and the options were displayed clearly and you chose to accept a voucher, you won't be able to swap for a refund. The best thing to do in this instance is check to see if the validity has been extended - see further down the article for airline policies. If not, use the voucher or you will lose your money
It may be difficult to predict when we can travel again, so you could choose a flight for 2022, where there's a higher chance travel will be less restricted.
Be aware when you book, that your trip's return date must be fully completed by 30 April 2023.
If you don't think you will want to fly, BA vouchers can be transferred to family or friends. You'll need to phone BA to do this.
Although the extension is shorter than BA's, you do not need to have flown by the date shown on the voucher, just booked.
EasyJet also allows vouchers to be transferred to family or friends.
Alternatively, you are allowed to extend your voucher's validity one time for up to 12 months.