Pan American Airways requires no advance purchase no saturday night stay overs as a matter of fact you can walk up to a Pan Am ticket counter and if their is availability you can purchase you ticket for the same price as American Airlines and US AIRWAYS 21 day advance requirment. Pan Am offers one way as well as round trip tickets, one way tickets are exactly half that of a round trip ticket! not so with american or US Air. Pan Am currently is charging $ 212 dollars one way to either Puerta Plata, Santiago, or Punta Cana plus tax from Newark. You may also fly into one city and leave from another at no penelty no such luck on either American or US AIR. Pan Am is also asking round trip air fares of $ 424 plus tax to Santiago, Puerta Plata, and Punta Cana from Newark. While I do like the A320 and it's comfort Pan Am's 727-200Adv while old is very reliable as well as comfortable for Pan Am offers more leg room than any US carrier, and their service is second to none if you haven't flown Pan am recently give them a try you will be very surprised. Pan Am will introduce widebody service to Santo Domingo within the next few months using 767 aircraft.