FILE - In this Dec. 4, 2013 file photo, President Barack Obama speaks about the new health care law during a White House Youth Summit, in the South Court Auditorium in the Eisenhower Executive Office Building on the White House complex in Washington. For two months, the talk was all about computer code. About response times. About glitches and bugs. With the website improving and tech chatter settling down, the conversation about the Affordable Care Act, or Obamacare, is turning in other directions _ with an aggressive assist from political forces on the left and right. (AP Photo/Carolyn Kaster, File)

President Barack Obama extended the cover for up to one year. Photo: AP

US government insurance that guarantees airlines are covered against terrorism and war was extended for four carriers, including Virgin America, that otherwise would have lost coverage at the end of the year.

President Barack Obama extended the insurance for as long as one year while on vacation in Hawaii, according to the order distributed by email.

Congress must also approve the extension, according to the order.

The companies covered also include Oracle Corporation founder Larry Ellison's Island Air, an intra-Hawaii carrier based in Honolulu.

The US stepped in to guarantee that airlines could receive insurance after the September 11, 2001, terrorist hijackings.

Most carriers remain covered under a law passed in 2002 and extended by Congress in a measure funding the Federal Aviation Administration into 2014.

Virgin America, Island Air and two others were not covered by the extension, so Mr Obama had to issue his order covering them, according to an FAA statement.

''We have participated in this approval process every time our insurance has renewed since our launch in 2007,'' Abby Lunardini, a spokeswoman for Virgin America, said in an emailed statement.

The other carriers are Cape Air, based in Hyannis, Massachusetts, and Seaborne Airlines, which operates flights for American Airlines Group in the Caribbean and the Virgin Islands.

Seaborne is based in St Croix in the US Virgin Islands.

Mr Obama's administration has proposed phasing out the government-guaranteed program for airline insurance, along with other similar programs, starting in 2015, according to the Office of Management and Budget.

Bloomberg