With less than half the scheduled flights taking off here in early April and more of the same anticipated as the coronavirus scare plays out across the world, San Diego’s international airport is facing a deep dive in monthly revenues that is forcing it to slash expenses and possibly delay the start late next year of a $3 billion project to expand its aging Terminal 1.

The airport’s largest airline, Southwest, has already cut by half the number of flights scheduled across its system in June, and by Wednesday, all three of San Diego’s once-popular overseas flights — to London, Frankfurt and Japan — will have ended.

Even more startling are stats released by the Transportation Security Administration, which reported that officers screened just 102,184 people at U.S. airport checkpoints on Monday — a nearly 96 percent drop from the nearly 2.5 million who went through security on the same day in 2019. No figures are available by airport, but in San Diego, a little more than 400,000 passengers boarded planes during the month of March, compared to well over twice that a year earlier, the Airport Authority reported.

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