Well a command circuit only works for ground forces, and hypothetically the Blood Spirits could do it with Snow Raven help - jump to Brim (using LFB), deal/fight for use of jumpships, then jump to Strana Mechty (again using LFB), then get to Huntress. Total time taken would probably be in the neighborhood of a couple of days, though a very well planned operation could take as little as a few hours. The downside to this is a lack of escorts, with SLDF warships in orbit, running the gauntlet would have been a bad idea.
Getting warships there will take a lot longer, especially if you don't want to risk the warship K-F drive breaking. Getting there in absolute safety means 2 jumps (using LFB), then "quick" charging the drive three times (175 hours each), and totaling about 22 days - too long to make much difference. This time can be cut down by risking both failure and damage to the K-F drive, personally I wouldn't risk anything more than a +2 control roll modifier, meaning that the "quick" charge time would be reduced to 100 hours per charge, with an end result of about 13 days. This wouldn't have been enough to make a difference in the naval battle, as that is already over at this point, but the warships could threaten those of Task Force Serpent's enough for a stalemate, and with the Bull Dog survivors arriving things would have started to look much better.