The only airlines JetBlue can merge with would be :southwest, Alaska, Hawaiian, spirt, frontier, virgin America.

The DOJ is already investigating DAL, UAL, AAL for price fixing. A low cost carrier is not going to be sucked up by another carrier who is just going to raise its fares. I use to work for Jetblue. I think the only airline to buy them is Southwest. That said under the PEA (which is in place until a CBA is voted in) allows Jetblue to sell up to 1/3 of the fleet without triggering a transactional event which means they could dump the 190's to UAL over 2-3 years while taking 320 deliveries. But once again New York and Massachusetts will not allow the only LLC with a strong northeast presence to be bought and raise fares for the voters.