I would like to get a family member a gift card or something similar that they can use to help pay for an airplane ticket to visit.
Certainly I could get a gift card for any given airline, but airfare prices change all the time, so knowing which airline to get the card for is impossible. I've seen a generic debit card like Vanilla Visa recommended but then there is no guarantee the recipient will use it for a flight as it can be used on anything. If possible I would like to ensure the gift is eventually used for what it was intended for.
Is there any method for giving someone funds to use for flights that works on any airline, but can only be used for plane tickets?