Wife and daugther want to go to London this summer.

I have the 75k in miles to get them one ticket [25k outbound and 50k home].

Wife has 25k in her account now, and we should have her 50k Amex promotion miles to transfer over within the next 30 days to cover the the rest.

Question is, can we book this now even though she has a deficit in miles?

For the 150k in miles we save ~$2500 in cash, not a terrible trade off...

Thanks,

Steve