Frontier - Last minute trip

[Backagain1]

We decided to do a quick trip to Vegas. Found one under 200.00 on Priceline and booked.
I paid an extra 24. both ways on Frontier for the seat. Someone had mentioned a suitcase a while back that worked under the seat on Frontier Airlines. I have that suitcase; will I need to pay to use this? I am packed and ready to go - trip in 16 days!

 

[bruceb]

We decided to do a quick trip to Vegas. Found one under 200.00 on Priceline and booked.
I paid an extra 24. both ways on Frontier for the seat. Someone had mentioned a suitcase a while back that worked under the seat on Frontier Airlines. I have that suitcase; will I need to pay to use this? I am packed and ready to go - trip in 16 days!

There is no charge for under the seat. However, I have seen inconsistencies with Frontier on whether they enforce the size limitations (8 X 18 X 14).
bruce

 

[Backagain1]

Thank you.