In this handout provided by NASA, the Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, stands on launch Pad-0A during sunrise at NASA's Wallops Flight Facility on October 16, 2016 Wallops Island, Virginia.
The launch is scheduled for 7:37 a.m. Saturday.
The launch should be visible as far north as Boston and as far south as Myrtle Beach, South Carolina, although the rising sun will make it tough to see. It attributed the delay to a "small aircraft" spotted flying at 500 feet about six miles offshore.
The rocket will deliver 7,400 pounds of crew supplies and hardware to the International Space Station. The launch is expected to be visible across much of the East Coast.
The US space agency said the weather forecast for the new five-minute launch window was 90-per-cent favourable.
Officially Cygnus OA-8 (enhanced version) with 3.7 t of payload will be launched tomorrow from same pad at 12:14 UTC.
Orbital ATK tweeted: "We were working no issues until an aircraft flew into restricted airspace".
The Antares rocket, fresh off being raised vertically early Friday morning, awaits launch set for Saturday, Nov. 11.
Hosting its first major mission in more than a year, Wallops attracted the customary crush of visitors. On Saturday, thousands of people came out into freezing temperatures for what they thought would be an eventful morning.
Watch the launch live beginning at 7:00 a.m. EST on launch day on NASA TV. And it may go down as one of the last to bear the familiar Orbital logo.
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