Yes, you can transfer Delta SkyMiles to your wife, but it is rarely a good financial decision in 2026. Delta allows you to move miles between accounts through their "Transfer Miles" feature, but they charge a significant fee: typically $0.01 per mile plus a $30 processing fee per transaction. This means transferring 30,000 miles would cost you roughly $330. In many cases, the cost of the transfer is nearly as high as the value of the miles themselves. A much more efficient "workaround" is to simply use your miles to book a ticket in her name directly from your account. Delta allows you to use your miles to buy a "Reward Flight" for anyone; you just enter her details as the passenger during the checkout process. This avoids all transfer fees while achieving the same result. The only reason to actually transfer the miles would be if she needs a small amount (like 2,000 miles) to reach a specific threshold for a high-value redemption she is booking herself. Otherwise, keeping the miles in your respective accounts and booking for each other is the standard savvy traveler's move to preserve the value of your hard-earned rewards.