In a bowl, mix the shredded chicken with BBQ sauce until well coated.
Heat olive oil in a skillet over medium heat.
Place one tortilla in the skillet and sprinkle half of the cheese on one half of the tortilla.
Add half of the BBQ chicken mixture and top with some red onion and cilantro.
Fold the tortilla over and cook until golden brown, about 3-4 minutes.
Flip and cook the other side until golden and the cheese is melted.
Remove from skillet and repeat with the remaining ingredients.
Cut into wedges and serve warm.