Thumb Score: +39

Frontier Airlines, an ultra low budget carrier have round trip airfares travelling to and from Philadelphia (PHL) and San Juan Puerto Rico (SJU) for $134, nonstop. On Frontier, your low airfare will only take you from point A to point B with a personal item that fits under the seat in front of you. There is no seat selection, no carry-on bag and no change.

There is a current Amex Offer if you could meet the minimum requirement of $50 Back on $200+ Spend on Flights. Details here.