Southwest Airlines Flight No. 1411 from Ontario International Airport (ONT) to Phoenix Sky Harbor (PHX) was set for an on-time departure on May 15, like any other day, but it wasn’t just another day. May 15 was the 40-year anniversary of the carrier’s ONT service when it first connected the Inland Empire to Southwest’s route map by way of the popular Arizona city.

Southwest has since grown into the largest airline operating at ONT, offering more than 230 weekly departures. On May 15, that was cause for celebration at Gate 403.

“The partnership between Southwest and Ontario has endured for decades as our organizations transformed our respective areas of the aviation industry, and we’ll treasure that friendship for decades to come,” said Alan D. Wapner, president of the Ontario Internation

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