Logged into my account > checking account > dropdown menu > order checks or deposit slips.
From that page:
Great News!
Several Chase checking accounts entitle you to free or discounted check packages. These discounts are not reflected in the prices shown on your screen. Please refer to the Customer Service phone numbers below or visit your local Chase branch to learn more about the benefits of your Chase account.
1-800-935-9935 (English)
1-877-312-4273 (Spanish)
Mine had a charge of $ 0.00