roxy loves car rides but she's also been coming shopping with me scince she was like a month old so shes really used to it, try getting them a carrier one big enough for them to move in and strech and stop every once in a while to let them pee and poo ect bring food and lots of water and maybe a litter box then put them somewhere where there is air conditioning a must then they should be fine and maybe bring soemthing from there cage so they have the scent of the cage in there with them or put a blanket or towel wat ever your gonna use to put in a crate if you have one and let them get there smell on it then put it with them, or if you dont mind letting them maybe run in the car then just bring a litter box and food and water if you have a car then i advise you to buy a dog thing that blocks them form jumping over the seat and put it in the middle so they cant get under your feet while you drving and if you have a van or suv i suggest still getting one and blocking off the trunk and letting them rome freely there i highly recomend car then airplane airplane is a bad idea and could cause alot more stress then a car hope that helps if any more further questions pm me