How do use JB Points elsewhere?
 

I have a few hundred thousand JB points, having been flying them regularly for years. But due to moving, I will rarely be flying JB again.
I will however fly AA.
Can I book AA flights on JB using my JB miles?

If not, where can I use JB points?

Not yet, but I think that that option is expected to be rolled out later this year.

One can currently redeem AAdvantage miles for travel on JetBlue -- subject to JetBlue's making award seats on particular flights available to partner carriers.

Same here, I have about 80K B6 miles via a credit card deal Barclay had for spending $1000.

I only got the card/miles because I thought the Spirit merger would go through and I guess it still could

I fly out of MSP and my B6 miles are more less useless, the option to book AA metal/partners using B6 miles would be nice.

You can redeem JetBlue points for flights on Hawaiian Airlines, where they have released partner award availability. However, the process is quite clunky and you need to call to speak with a phone agent to find availability and book.

https://www.jetblue.com/airline-part...aiian-airlines