Jimmy Kimmel kicked off his first show of 2018 by mocking President Trump's latest tweets, including the bizarre post in which he took credit for airplane travel safety.

The President tweeted on Monday that since he took office, and having been very strict on commercial aviation, it had been the 'the best and safest year on record'.

However, as Kimmel pointed out on his show, while there were no deaths on commercial flights in 2017, it was hardly the 'safest on record' as the President claimed.

Mockery: Kimmel kicked off his first 2018 show by reading out several of President Trump's latest tweets, including one taking credit for no deaths on commercial flight, and one boasting about the size and power of his nuclear button

'Do you know which other years had no commercial aviation fatalities? 2016, 2015, 2014, 2013, 2012, 2011, 2010—in fact, the last one was in 2009.

'So thank you, President Trump, for being so effective you actually went back in time to improve my safety! What won't this man take credit for?'

He also joked that 'Not since Harrison Ford was president have we felt so protected on a plane.'

Shortly before the show started, the president fired off another classic Trump tweet, this time aiming his Twitter gun at North Korean dictator Kim Jong-Un.

Caught out: As Kimmel pointed out on his show, while there were no deaths on commercial flights in 2017, there were also no deaths from 2010 to 2016

Seemingly annoyed with comments made by Kim during a New Years speech during which the portly dictator pointed out that he had a 'nuclear button on the table', Trump retaliated.

'North Korean Leader Kim Jong Un just stated that the “Nuclear Button is on his desk at all times.”

'Will someone from his depleted and food starved regime please inform him that I too have a Nuclear Button, but it is a much bigger & more powerful one than his, and my Button works!

After reading out the tweet to his audience, Kimmel added: 'That’s right. Happy New Year, everybody!

'We have two maniacs with nuclear warheads bragging about who has the bigger button.'