Southwest Airlines' flight attendants have ratified a new labor contract valued at $6.3 billion, which includes significant pay raises over the next four years. The contract, covering nearly 20,000 flight attendants, was approved with an immediate 22% pay increase and will see a total pay rise of about 33% by the end of the four-year period. This agreement sets a precedent that could influence future labor negotiations at other U.S. carriers. The contract becomes amendable in 2028.