puerto rico: I am Traveling to Pennsylvania June 23rd - 25th and want to site see Puerto Rico for a few days but Im coming from the caribbean.|||Yahoo fare chaser is the best I have found, but we are flying to san Juan April 28th and found flying out of Newark is cheapest, 99 one way!! Found it on Yahoo fare chaser.|||Travelling out of Philly is definitely the cheapest but if you can, newark or JFK will be even cheaper. Expedia generally has the best rates. Report Abuse |||Always check the internet first.|||First, check the Internet Travel sites, Orbitz, Expedia, or Travelocity. They should give you fares ordered by price. If you can make it to New York, check with Jet Blue, they have extremely cheap flights if you are willing to travel late at night. Lastly, try those on-demand price (you name the price, they name the flight if available) sites like Priceline.