American Airlines and US Airways are encouraging workers to write letters to their politicians in support of the merger and against the U.S. Department of Justice's anti-trust lawsuit.
In a newsletter sent to employees on Thursday, the carriers said they have set up a website where employees can send automated e-mail letters to their elected officials.
"If every one of our more than 100,000 employees of American and US Airways participates, over half a million letters will be sent to various government and elected officials across the country," the newsletter said.
The carriers are also planning to fly dozens of employees to Washington D.C. on September 17 and 18 to meet with U.S. Senators and House members to discuss the merger benefits.
"The two-day event will culminate in an employee rally in the middle of Capitol Hill - our voices will no doubt be heard!" the airlines told employees.