Check your cards for "Bonus Miles Offers and Bonus points"

Spend X amount and receive Bonus Miles...can be used up to 3x. The offer needs to be loaded by 12/31/2025. Note: Once you load it you only have 90 days to complete all the transactions, so take that into consideration and maybe wait to load these offers.

I have one of these offers on my Delta Amex card and my Platinum Amex card.