Link to purchase the free personal item Spirit bag: https://www.amazon.com/BoardingBlue-F...

Link for packing cubes: https://www.amazon.com/eBags-Packing-...

I make sure all of my clothes can go with one pair of shoes to minimize the amount of shoes I need to bring.

This bag would also work for Frontier Airlines.

You can find more of my tips at http://www.thetravelingchild.co