Ameerican Airlines
lcc
The ticker symbol for US Airways was LCC. However, US Airways merged with American Airlines in 2013, and the combined entity now trades under the ticker symbol AAL for American Airlines Group.
The ticker symbol for JetBlue Airways is JBLU and it is traded on the Nasdaq.
Qatar Airways is a privately owned company and does not have a publicly traded ticker symbol. It is operated by Qatar Airways Group, which is wholly owned by the State of Qatar. As such, you won't find a stock ticker for Qatar Airways on any stock exchange.
AirTran Airways was founded as ValuJet Airlines in 1992, and has been AirTran Airways since 1997. The ticket symbol for AirTran Airways is AAI.
International Consolidated Airlines Group SA
AAQS Pet Airways parent corporation was originally named American Antiquities, Inc.
The ticker symbol for US Steel is X and it is traded on the New York Stock Exchange.
Midwest Airlines is owned by Republic Airways Holdings. Republic Airways Holdings trades on the NASDAQ under the ticker symbol RJET.Note: They also own Chautauqua Airlines, Republic Airlines, Shuttle America, Frontier Airlines, and Lynx Aviation
Marlboro does not have a ticker symbol of it's own but the company's that own the brand do. The Marlboro brand is maintained by Altria in the US (ticker symbol MO) and Philip Morris International (ticker symbol PM).
Bayer trades in Germany under the ticker symbol BAY.It also trades in the US on the Pink Sheets using the ticker symbol BAYRY.
GUM is not the ticker symbol for any publicly traded company at least in the US.