Can you carry shampoo in my suitcase on Southwest Airlines?

Yes, you can carry shampoo in your suitcase on Southwest Airlines, but there are some restrictions. If you are bringing it in your carry-on bag, it must be in a container of 3.4 ounces (100 milliliters) or less and fit within a quart-sized bag. There are no size restrictions for shampoo in checked luggage, so you can pack larger bottles there. Always check the latest guidelines before traveling, as regulations may change.