Also, flying from Bangkok to Phuket on 11/17/18. The tour operator says its on Thai Air Asia (which is a joint venture of Malaysian low-fare airline AirAsia and Thailand’s Asia Aviation).but when I google the above code it says its Thai Smile Air (a wholly owned subsidiary of Thai Airways). Anybody know anything about those airlines in terms of dealing with traveling with my wheelchair, seating, etc?
Definitely make sure to contact them. If it is a small plane you want to make sure they are able to put your wheelchair in the cargo hold without laying it on its side (if it is not collapsible and electric).
Most of the larger airlines have special needs seating that can be requested at the airport for those requiring any special assistance. These seats are closer to the front of the plane, are limited and are assigned based on a first come first serve. The low-cost carriers may or may not do this. When you call to give the dimensions of your wheelchair you can ask about this service.
If you are traveling on a low-cost carrier take extra precautions in terms of securing your wheelchair. Bubble wrap or tape pieces up to reduce the potential of anything getting damaged. It is more difficult to get chairs repaired over there than here in North America.