Peel the mango and remove the pit. Cut the fruit into bite-sized cubes and place them in a large mixing bowl.
Wash the cucumber thoroughly. Dice into small cubes and add to the bowl.
Rinse the blueberries under cool water and drain well before adding them to the mixture.
Cut the avocado in half, remove the pit, and dice the flesh into chunks. Add to the bowl.
Gently fold all salad ingredients together using a spatula.
In a small bowl, whisk together olive oil, fresh lime juice, honey, salt, and black pepper until fully combined.
Pour the dressing over the salad.
Toss gently to coat all ingredients evenly.
Sprinkle chopped cilantro over the top and lightly mix again.
Serve the Juicy Mango Cucumber Salad with Blueberries immediately, or chill for up to one hour before serving.