We all know flying can get quite expensive, especially when you have children. That can really put stress on your bank account.

Thankfully, Frontier Airlines is trying to make flying with kids more affordable.

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Thrillist.com is reporting that Frontier Airlines is allowing kids 14 years old or younger to fly for free ... kind of.

You must be a Discount Den member to take advantage of this and that costs $70 a year.

Every person in your family that is 15-years-old or older (adult) is eligible to have a child fly for free with them.

Right now, Frontier Airlines has flights from Bozeman to Denver, but  make sure you check the dates because this deal is only available for certain days throughout the rest of the year.

For full details, check out Thrillist.com.