Bush to be buried after four-day tribute

George H W Bush was to be laid to rest Thursday, concluding a four-day tribute to the 41st president that saw America briefly set aside its political divisions.

After a state funeral Wednesday in Washington that was attended by the country's five living presidents and foreign dignitaries, Bush's flag-draped coffin was flown to Houston.

He will lie in repose at St Martin's Episcopal Church, where the Bushes worshipped for decades, until he is buried.

Bush will be interred at his presidential library in College Station next to his wife Barbara, who died in April, and their daughter Robin who died of leukemia at age three.

At the memorial service President Donald Trump and First Lady Melania shared a front row pew in the National Cathedral with past presidents Barack Obama, Bill Clinton, Jimmy Carter and their wives as an honour guard brought Bush's casket into the prayer hall.

Former president George W Bush tapped the casket twice when he walked up to deliver a rousing eulogy, fighting through tears as he sang the praises of his father and predecessor as commander-in-chief, who died Friday at age 94.

"He showed me what it means to be a president who serves with integrity, leads with courage, and acts with love in his heart for the citizens of our country," Bush said.

"He was born with just two settings -- full throttle, then sleep," he said.

"To us, his was the brightest of a thousand points of light," he said in a reference to his father's signature call to volunteerism.

Wednesday's funeral capped a national homage that saw Bush lie in state in the US Capitol rotunda, where thousands paid respects to a statesman who steered the nation through turbulent times including the end of the Cold War -- and in a style dramatically different to the current president.

Since Bush's death, Trump has traded his usual provocative posture for one of solemnity, tweeting before the service about "a day of celebration for a great man who has led a long and distinguished life."