Just like the airplanes that make up their fleets, airlines come and go, dropping some flights and adding others as they study past and predicted passenger behavior. For Palm Springs International Airport (PSP), seasonal additions have been outnumbering deletions lately.

Leading the line-up of new nonstops is Delta, which has announced new seasonal nonstop service to and from Atlanta between December 20, 2018, and March 30, 2019. United is launching nonstop service from Newark December 19, 2018, through March 30, 2019.

JetBlue is starting its schedule from New York’s JFK a month early, beginning October 10. The carrier will offer its premium Mint service during the peak holiday season — December 20 through January 3.

On the loss side of the ledger, Canada’s WestJet axed its nonstop service to Toronto, effective April 28, citing a decrease in demand. It will continue to operate nonstops to Calgary and Vancouver.

Don’t forget Ontario

Besides expanding its service to PSP, JetBlue is adding new nonstop flights between Ontario International Airport (ONT) and JFK. JetBlue will be the only airline to offer nonstop service to the East Coast from Ontario. Service begins September 5, 2018 and Ontario will be the 73rd nonstop JetBlue destination from New York-JFK.

Ontario International Airport will become the tenth airport served in California by JetBlue and serves some six million people in San Bernardino and Riverside counties, as well as portions of Orange and Los Angeles counties. The Inland Empire has become one of the fastest growing metro areas in Southern California due to its affordable home prices, new construction, and a growing nightlife and cultural scene. The San Bernardino-Riverside-Ontario metro area is on track to grow by some two million people over the next three decades and Ontario International Airport has demonstrated it is committed to supporting that growth.

“The question we get most often is ‘when might JetBlue come to Ontario?’ So we are thrilled to say that that day has come,” said Alan D. Wapner, president, Ontario International Airport Authority. “JetBlue’s confidence in ONT as a gateway airport able to provide first-rate facilities and services is well-placed. We promise we won’t let them down.”

JetBlue previously served Ontario between 2000 and 2008 and is returning a decade later, encouraged by the surge in customer demand in the Inland Empire, as well as the airport’s leadership position on smart growth in Southern California. Ontario was originally JetBlue’s sixth overall destination and the very first on the West Coast.