Answer :
Final answer:
The airlines operating at Toledo Express Regional Airport are Allegiant and American. They represent the mix of traditional large carriers and low-cost alternatives that the airline industry has embraced following the changes from the early 2000s.
Explanation:
The two airlines that operate at Toledo Express Regional Airport are Allegiant and American. The airline industry has experienced a significant transformation since the events of 9/11, with a noticeable shift from large national carriers like Delta, American, and United, which utilized a hub-and-spoke model, to more regional and lower-cost carriers. This shift also saw changes in labor agreements and the structure of the industry. While Allegiant offers direct, low-cost flights and does not operate under the traditional hub-and-spoke model, American is one of the large carriers that had to adjust to the changing industry dynamics.