Terminal C will be open to the public next Monday, but Eyewitness News got a sneak peek.
It took about half a billion dollars to build the terminal, which has 48 kiosks, a security area equipped with full-body scanners, free Wi-Fi throughout the building and a brand new parking structure with about 2,000 spaces.
Along with new dining options and restaurants, there are six new gates in the terminal.
Even the floor has gotten an upgrade. It's all marble shipped in from Germany.
Southwest and Frontier airlines will be moving in to the new space.
"Moving is hard, so our employees are working very hard to make a great experience," said Brad Hawkins of Southwest Airlines. "We already carry more people out of Orange County than any other airline - about 50 flights a day. With this new facility, [there is] perhaps more potential for new opportunities. It's all about cost and the population, but we feel very optimistic about the future."
Travelers will also see art exhibits rotating throughout the walkway from Terminal B to Terminal C.
There's also a new opportunity for international flights for the first time at the airport.
"We have a new customs facility in Terminal C, and that's going to allow us to bring in new destinations from existing airlines or possibly some new airlines themselves, and we could fly most potentially to Mexico from here," said Jenny Wedge of John Wayne Airport.