Use a search engine like Google to find several travel websites with vacation packages to Puerto Rico.
Visit a webpage with vacation packages to Puerto Rico, such as Trip Advisor's Puerto Rican Hotel and Flight page. (See Reference 1.) Select a destination you want to visit and enter the dates for your trip. Write down the quoted price.
Return to the search page, and check several other travel sites for inexpensive Puerto Rican vacation packages.
Find a local travel agent. You can search for agents near you by entering your location on the American Society of Travel Agents website. (See Reference 4.)
Consult with a travel agent and ask for their cheapest vacation packages to Puerto Rico. Write down the quoted price.
Compare all the prices and select the most desirable trip. When you've picked a vacation package, book your trip.