Letting someone else use your frequent flyer mile number?
Let's say it's you and your wife traveling together. You have a frequent flyer mile number and she does not. Can you use your frequent flyer mile number for both tickets or can it only be used for its original owner? Or maybe only once per flight or some such?
In some ways this sounds unethical but in the case of a married couple I think there's some pragmatism to it as well. Let's say 25k will get you a round trip flight to anywhere in the US. You and your wife each have 12.5k so if you want to get a free round trip you'd have to pay to transfer the frequent flier miles to one or the other whereas if only one account got them for both people then you could spend them at no inconvenience to yourself.
Best Answer
Most frequent flyer programs only allow you to credit mileage to the account of the person flying. Inputting the same frequent flyer number for two different passengers wouldn’t work, because the name on the account has to match the name on the ticket. Most likely, the miles simply wouldn’t be credited, if the number’s even accepted at all. (I suppose it might work for two people with identical names and birthdates, though.)
https://thepointsguy.com/2016/07/earn-miles-someone-elses-ticket/
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