Go to Frontier.com and click on the sign-in link at the upper right-hand corner to view and pay your bill online. If you don't have an online sign-in for Frontier yet, this is also where you create one.
If you need a Frontier online account, click on "Create a Frontier ID" on this page. Once you create an account, you can manage your bill pay options. If you already have an account, sign-in with your Frontier ID and password. Pay your bill online with credit card or automatic bank transfer. You also have the option to set up automatic bill pay.