My son has about 12,000 miles in a CO account, and I have about 40,000. We rarely fly CO anymore and I was wondering what I could do to pull the miles out of his account to one that we do use. I received the CO offer to transfer miles at a rate of $5 per 500 miles, but that's $0.01 per mile, which is not cheap.

Any other options out there?

Thanks in advance for the help.