article_snippet.sent: Pan American World Airways (Pan Am) was a dominant and influential airline which declared bankruptcy and ceased operations in 1991 .
article_snippet.sent: Pan American World Airways (Pan Am) promoted Pan American World Airways (Pan Am) launch of the Concorde in the 1970s (left)
article_snippet.sent: while Trans World Airlines (TWA) promoted Trans World Airlines (TWA) New York route .
article_snippet.sent: British Overseas Airways Corp led to the creation of British Airways (left) while Continental merged with United Airlines' parent company .
article_snippet.sent: It was a time when It cost an incredible amount of money to purchase a ticket for a commercial flight, with many of the ads promoting transatlantic or transpacific travel.