The decision means the number of flights in and out of Ontario by this fall will drop by almost 40 percent.
"I'm sorry to hear they're cutting back on flights because this is a great airport," said traveler Linda Duemler.
"It's close to home, 30 minute drive, easy drive, easy parking," said traveler Diana Fincher.
All passengers can do now is hope more flights are not cancelled.
"It's very sad, so we hope you all come back and have a lot more flights out of our airport," Fincher said.
"Passengers will be affected as there are fewer direct flights. They may have more connections and may face more jam-packed aircraft," said Harold Johnson, Ontario International Airport.
And the hits keep coming. Fewer flights could cause airfares to go up. For those looking for any kind of bright side, Terminal 2 might be even less crowded in the future than it is now. Eyewitness News reporters Leslie Miller and Rob McMillan contributed to this story.