California airport explodes in popularity as major airlines locked in turf war

San Diego is flying high — leaving some of the world’s biggest cities in the dust.San Diego International Airport has been crowned the fastest-growing major airport on the planet in 2026, zipping past better-known heavyweights as an increasingly fierce airline turf war sends flights soaring.The single-runway Southern California airport, better known as SAN, has seen the number of passenger flights jump a whopping 13% compared with 2025, according to a new analysis from Simple Flying.The biggest news, opinion and culture shaping California right now.

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Never miss a story With that surge, San Diego outpaced Hanoi’s Noi Bai International Airport and Zurich Airport, which both saw a 12% jump.For an airfield that already moves tens of millions of passengers, double-digit growth is unusual.So, what’s fueling the boom?The aviation hotshot has two rival airlines largely to thank for its meteoric rise — Southwest Airlines and Alaska Airlines, both battling for dominance in the suddenly explosive market.

Southwest has been scrambling to lock down its crown as SAN’s king — adding 10 new destinations to turn the hub into its biggest California battleground.Alaska Airlines, also keen on growing their presence at what’s become a key West Coast hub for the brand, is adding half a dozen new routes and boosting flight departures by nearly 40% year-over-year.With the two behemoths eating up precious and limited asphalt space, other, carriers with limited clout are now reportedly being squeezed out.

Frontier Airlines recently chopped its San Diego schedule by 20%, for example — as real estate became limited and sent costs soaring.So far, legacy heavyweights like Delta, American, and United have largely kept their schedules unchanged.The rush of activity has been raising eyebrows in the industry, as the airport ...