Inform the airline. If you are traveling by air, let the airline know you are traveling with an autistic child, so flight attendants are able to handle any issues you may have while flying. You might also want to inform any passengers who are seated near you and your family.
Speak to your child beforehand. Simulating the vacation before you travel is a way to help your autistic child understand what to expect. You can make books about the trip and explain who is traveling with you, where you are going and what you are going to do when you reach your destination.
Pack earplugs and headphones. To relieve any kind of sensory stress, make sure you pack a good supply of earplugs for your child. MP3 players can also come in handy, so include these, stacked with familiar and favorite songs, to keep your child entertained and calm while traveling.
Have your child wear identification. In case your child wanders off, attach ID to the back of your child's shirt or pants. Include your name, address and cell phone number. Also include the fact that your child has autism, so people are able to keep your child safe and calm until you collect them.
Pack snacks and entertainment. You might like to wrap small gifts - such as crayons or figurines - and have your autistic child unwrap one each hour, if you are travel for a long period of time. Also pack familiar toys and games that your child enjoys as well as snacks and small treats to comfort them.