By Andrea Shalal and Kanishka Singh

ABOARD AIR FORCE ONE/ WASHINGTON, Feb 19 (Reuters) -

U .S. President Donald Trump said on Wednesday he was not happy

with planemaker Boeing ( BA ) and his administration might have

to go a different route with Air Force One planes.

The comments were the White House's latest attempt to

ratchet up pressure on Boeing ( BA ), which is at least three years

behind schedule in delivering two new Air Force One jets.

Trump and the White House have recently railed against the

jet maker, saying it has failed to deliver a new aircraft on

time.

"I'm not happy with Boeing ( BA )," Trump told reporters on Air

Force One, airing his frustration once again. "We gave that

contract out a long time ago."

The fixed-price contract was taking too long, he said,

adding, "We may do something else. We may go and buy a plane, or

get a plane or something."

But he ruled out Boeing's ( BA ) rival Airbus as an

alternative.

There was no immediate comment from Boeing ( BA ).

On Tuesday, a White House official said Boeing's ( BA ) Air Force

One program could be delayed until 2029, or beyond, citing

supply chain issues and changing requirements, after White House

remarks over the weekend that it had fallen behind.

The delays are frustrating, but little can be done to speed

delivery, the official told Reuters, adding that Boeing ( BA ) faced

problems after the makers of some components went out of

business.

Trump has been deeply engaged with the program since his

2016 presidential campaign.

He extracted a promise from then-CEO Dennis Muilenburg to

cap the program's cost at $4 billion. Those fixed-price contract

terms, questioned by analysts at the time and finalised in 2018,

have cost Boeing ( BA ) more than $2 billion.

Trump's renewed engagement could signal further problems for

Boeing ( BA ), which said the company was meeting his billionaire

cost-cutting ally Elon Musk to get the plane updated quicker,

according to analysts.