Led by the state's first nonstop transatlantic flight offering, Charleston International smashed a previous record for the most passengers in April.
With British Airways' launch of twice-weekly flights to London, the annual Cooper River Bridge Run influx and April's usual draw of tourists, the state's busiest airport ferried a record 432,406 travelers through its terminal last month.
That's up about 8 percent over the same month last year.
For the year, about 1.4 million tickets holders have flown in and out of Charleston, up 14 percent over the same four months in 2018, according to figures released Thursday by Charleston County Aviation Authority.
"Growth continues to exceed our expectations, which shows how much Charleston is a popular destination for both tourists and business travelers," airport CEO Paul Campbell said. "That's central to expanding and growing the airport, and we have to make sure we have the capacity to handle the growth."
The airport is now headed into some of its traditionally busier travel months as the late spring and summer seasons bring in more visitors.
Last year, Charleston airport set a record with 4.47 million passengers coming and going. Campbell believes the terminal could see more than 4.8 million this year if the growth trend continues.
A recent airport forecast projects the number of passengers will climb to close to 8 million by 2028, requiring another wing and expanded ticket counter space on the terminal. A new 3,005-space parking deck is already under construction.
With British Airways' arrival in April, the terminal is now served by nine airlines flying nonstop to 31 airports in 27 cities.