This Travel Aire Kennel Carriers for dogs is up to the challenge! They work well for a road trip and are airline approved. Can be used for dogs and cats.

Features: Reinforced, heavy-duty plastic, strong and durable to stand up to heavy use.
Well-ventilated, keeps pets comfortable and safe. Dark gray color. Meets most airline requirements for domestic and international pet travel. (Please check with your airline for specifics prior to traveling.) Available in three different sizes.

I have used the large sized kennel for my cross-county trip to accommodate two grown cats. It was spacious enough to make them feel comfortable. The wire door has a secure locking system and is wide enough in case you have to “help” your animal to get into the kennel. The only thing I noticed was that the kennel is quite heavy to carry, especially when accommodating two cats with 8 lbs each.