Gaining regulatory approval for another airline merger will not be easy.

But Justice has taken an aggressive stance against airline mergers, for good reason.

There has not been a major airline merger in more than a decade.

Should government step in to block any airline mergers?

The deal, which still faces major hurdles, would be the first significant airline merger in four years.

By any measure, this is a terrible moment to propose an airline merger.

These would probably be among the most immediate effects if the latest round of proposed airline mergers comes to pass.

The deal beat a Delta offer and may lead to more airline mergers.

When completed on June 1, 1961, it was the largest airline merger in history.

A series of airline mergers could take place in the coming months as the industry faces the economic slowdown.