There are a lot of extra things to pay for in that first year of your child’s life, but it’s the one year when they can join you on a flight for free—or is it?

The internet is blowing up over a new promotion from Frontier Airlines that is piquing the interest of parents across America.

Frontier’s “Kids Fly Free” program for children under 14 sounds like a dream come true for parents who have put off vacations or taken a few too many road trips with the kids to save on travel costs, but is it really free?

Kind of. The catch is you’ve gotta be a member of Frontier’s Discount Den (it’s $60 a year), and only one kid can fly for free for every one adult ticket purchased. It’s also only good for non-stop domestic flights on certain dates that are subject to change.

The dates, so far, are as follows:

February: 12, 13, 19, 20, 26, 27
March: 5, 6, 12, 13,19, 20, 26, 27
April: 2, 3, 9, 10, 16, 17, 23, 24, 30
May: 1, 4, 7, 8, 11, 14,15, 18, 21, 22, 29
June: 1, 4, 5, 8, 11, 12, 18, 19, 25, 26
July: 9, 15, 16, 22, 23,29, 30
August: 5, 6

data-instgrm-captioned data-instgrm-version="4" style=" background:#FFF; border:0; border-radius:3px; box-shadow:0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width:658px; padding:0; width:99.375%; width:-webkit-calc(100% - 2px); width:calc(100% - 2px);">

According to Frontier’s terms and conditions, “tickets must be purchased by 11:59 pm Eastern time on Feb. 12, 2019 for domestic travel within the continental United States. Travel is valid through Aug. 11, 2019 on specific day of week as listed. The following blackout dates apply: Feb. 14-18, Apr. 18-22, May 23-25, May 27-28, Jun. 28-Jul. 8, 2019. 14 day advance purchase required.”

There’s also a whole list of dates that are subject to change, and you’ve gotta remember that things like the seat assignment fee and checked bag fee are not included.

If you are flexible about your travel dates, this could be worth checking out, especially if you’re trying to book for two adults and two or more kids.

You might also like: