Yes—there are limits on how many bags you can bring, and they vary by type:
Carry-On Bags:
You’re allowed one carry-on bag and one personal item (such as a purse, tote, laptop bag, briefcase, diaper bag, or small backpack), in line with FAA regulations.
Checked Bags:
You can check up to 6 bags per trip.
Note: For operational reasons, the number of checked bags accepted may be fewer than 6 on certain flights.