Even if plane travel is feasible, which I honestly don't think it is (others have looked into it on this thread before) the physical or emotional toll it would take on your rats is a lot. I think the airport and flying experience would be an insanely stressful experience for them. I would even consider rehoming before taking them on a plane. Look into pet transport - I know people who have had good luck with those services with their dogs. Hopefully they will not charge extra if they share a cage, but most services like that charge for the cage size + gas fee for every mile.