In order to take your cat with you for a trip, you are going to need a reliable pet carrier. The Sport Pet Foldable Cat Carrier is worth a look. It has an extra large opening with a removable door. It measures 23.12” L x 18.75” W x 17.25”H and lets you fit a 24″ waterproof pet bed inside.
This pet carrier lets you carry cats up to 35lbs. Great for a trip to the vet. You can find out more here.