The Americans boarded two chartered flights to the United States, which departed Tokyo at 7:05 a.m. Monday, according to a statement by the United States Embassy in Japan.

As the passengers prepared to leave the country, Japanese health officials said the number of confirmed coronavirus cases found on the ship, the Diamond Princess, had grown by 70, to 355.

“Can’t get off here fast enough,” said Sarah Arana, 52, a medical social worker from Paso Robles, Calif.

Only American passengers who were screened and did not show any symptoms of the illness were allowed to board the flights, according to a statement from the State Department.

Once in the United States, passengers will undergo a 14-day quarantine at either Travis Air Force Base in Fairfield, Calif., or Lackland Air Force Base near San Antonio.

The embassy said that those who did not take the charter flights would not be allowed to travel to the United States until March 4, two weeks after they would otherwise be allowed to leave the ship.