The flight of a helium balloon that will attempt the first nonstop crossing of the United States has been delayed for the third time this week by bad weather here.

The balloon DaVinci TransAmerica, which will be piloted by Vera Simons of McLean and will carry three other passengers, is now scheduled to leave this Oregon coast village next Tuesday.

Meterorologist Bob Rice, who is providing weather information to the balloonists from an information center in Bedford, Mass., said the flight will have to be delayed until at least Tuesday when a fair-weather system is expected to approach the Oregon coast.

The balloon flight, sponsored by the federal government, nine major aerospace corporations and a soft drink company, is scheduled to last six days and nine hours for traveling the 2,295 miles from Tillamook to Norfolk, Va.

The balloon, which is larger than the Goodyear blimp, had been scheduled to lift off here on Monday. The delay was caused by five days of intermittent rain that began last Saturday.

The flight requires a six-day forecast of fair weather and little days of intermittent rain that began last Saturday.

The flight requires a six-day forecast of fair weather and little chance of thunderstorms, according to meteorologist Rice.