We are sailing on HAL and the requirement was 72 hours prior (very specific) for PCR, 2 days (not specific) for antigen. Don't know if RC is different, but 2 days would certainly be safe for any of them.
Word of warning: We've tested many times with Rite Aid and had fantastic service. Now they have partnered with Quest Labs and it is TERRIBLE. They aren't even busy and it took them until 11:59 pm the third day to get our results to us - and we would have missed the ship. Ended up having to arrange a proctored test through Azova, where we used a sealed kit we already had and they monitored the entire process, from unsealing to incubation. Then we uploaded a photo of the tests and got certification within a few minutes.
Good luck, and enjoy the cruise when you get there! The stress beforehand - ugh.
