I was searching Airline tickets, from New York to Shanghai, the price differences ranged from from $757-$5199(economy class), huge gap! how could this be? ! It's a better idea that I go back to my travel agent, I am lost on these cheap tickets ".com"s!

Although I travel a lot, I have never bothered to figure out how these tickets priced.

Sometimes I get incredible luck, the flight attendants would move me form economy to business class, or from business class to first class! And I have never bothered to ask why, either, since I dont pay extra. You will get very nice gift from airline when you fly first class.