Upvote:1
As stated in Timatic, the database used by airlines:
Visa required, except for passengers with a valid visa issued by Canada, USA, a Schengen Member State or United Kingdom, visa waiver fee: USD 100.-
So if and only if you already have a Canadian, US, Schengen or UK visa (transit visas also count), you do not need an Antiguan transit visa.
Otherwise, you must apply for one, which can be done here