score:9
It may depend on the FF program, but having worked for an airline, no. The FFnumber isn't assigned for the purchase, it's for when the person associated with the FF number travels. Names are checked. If you try and assign it to your wife for usage, it will not be permited.
However, you can (At least with Qantas, for example) both get an account (free). Then you're free to pool or swap miles/points between each other, for when one needs to use them at a later stage.
Upvote:5
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 wouldnβt work, because the name on the account has to match the name on the ticket. Most likely, the miles simply wouldnβt be credited, if the numberβs 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/