Contact the local Thai Airlines office in the city of departure or contact by email, which you can find on the website. Therefore email addresses differ from country to country.
Now ask them for special help at the airport.
Explain to the staff about your medical condition and let them know what special help you are looking for.
Your name and contact number
Flight number
Date and time of departure
Flight booking confirmation details
Thai Airways requests that you request wheelchair service at the time of ticket booking or 48 hours prior to flight departure.
You must have medical proof of your inability to get special assistance at the airport.
Type of wheelchair; electric or manual wheelchair.
Wheelchair size and dimensions.
Weight of the wheelchair.
Wheelchair battery type.
Is the wheelchair foldable or not?
To Summarize