Originally Posted by
Yoshi212
B6 (Jet Blue) has its won subforum here on FT and I've asked a MOD to move this there. I don't know all the options but I personally use my Amex MR points when I want to redeem on B6.
Transfer is quick and I believe 1:1.
Unless there's a sale on, MR points are
not redeemable 1:1 for B6 points. The usual rate is 5:4, so for example 40K MR points yield 32K B6 points.