For a complete excursion to Mekong Delta, you need time to visit many tourist sites here.
From 2 to 4 days is a reasonable time for you.
But if you don't have too much free time, you can choose a one-day tour of the Mekong Delta.
With interesting local locations in Long An, Tien Giang, Ben Tre, ...
You will have extremely interesting experiences here.
Read more: Mekong Delta Full Day Tour