The number last week was 576,000 claims, down sharply from a peak of 900,000 in early January.
The larger trend in jobless claims is down, while airline reservations and manufacturing work shifts are up.
Still, a total of 18.9 million people are continuing to collect jobless benefits, up from 18.2 million in the previous week.
The four-week average of claims, which smooths out weekly variations, dropped to 746,000, the lowest since late November.
It's evidence fewer employers are cutting jobs amid a decline in confirmed coronavirus cases and signs of an improving economy.
These persistently high jobless claims indicate a lot of labor market volatility.