Let them know that he has ASD/SPD.. That way they can help you.. there are programs that allow you to go through the whole process of security. boarding and then flying on a plane for children with ASD.. Im not sure if SW do it.. but that program fills up fast and I dont think that will help you so close to your trip...
http://www.friendshipcircle.org/blo...hearsal-programs-for-individuals-with-autism/
Take his own breakfast.. you can take liquids on the plane. they just have to be purchased after security..
My son has SPD. and ADHD.. he loves his cap.. or woolen beanie . on at all times... so security can be fun. when he has to take it off.. practicing at home was important.. we would put our chairs in a row. and pretend to be on a plane.. I would come down the aisle and get him to go his seat belt etc..
Youtube security procedures for him to watch.. also what its like to be on a plane .
http://www.parents.com/health/autism/resources/travel-tips-children-with-autism/
https://www.specialglobe.com/travel...-with-autism-spectrum-disorder-on-an-airplane
http://www.minitime.com/trip-tips/7-Tips-for-Flying-with-an-Autistic-Child-article
Talking to your son about what will happen is important.. there are some great books to read to him too..
Books :
http://www.momto2poshlildivas.com/2013/07/10-books-for-kids-taking-first-flight.html
I have used some of these books and they are great.. if you can get them and read them to him before you leave...
This comes directly from my son..
Having gum, because it pops your ears.
a pillow , in case you doze off.
comfortable clothing.. no new clothing..
stuffed animal. in case you want to play .
note book. in case you want to write or draw.
electronic device. for entertainment . headphones
food. and drink..
some candy.. I recommend Swedish fish .. !!!!
we always take take an inflatable ball. for the gate... we find out quiet gate and blow the ball up. and then let him go crazy with it.. and a skipping rope,
and make sure you have done his dry brushing or deep pressure ... sensory diet is very important...
I would get him used to a scent on his pillow . like a lavender a week or two before we leave.. and then take it with us . small amount on a hankie can be great at an airport or on a plane to hide those smells only they smell.. and then on his pillow of a night time to help sleep. in a strange bed... and different smelling linens..
Hope some of these help.. and hope you have a great trip..