Jeremy Corbyn said he would not be able to stand for Brexit is delayed.
The Labor leader believes he can trap the Prime Minister. October 15 election date, forcing Mr. Johnson to seek an extension from the EU.
Mr Corbyn said he would be back in the UK for a short time.
Stephen Gethins, the party's Europe spokesman in Westminster, said his first priority was "making sure no-deal is off the table". He told the Times: "We can not trust Boris Johnson one bit."
And Labor and SNP chiefs have already held talks on the topic of a crisis in the UK.
Mr Johnson wants to visit Aberdeenshire on Friday to visit a farm in Aberdeenshire Brexit on October 31.
Jo Johnson quit as a senior minister attending meetings of his brother's Cabinet, saying that he has been "torn between family loyalty and national interest – it's an unresolvable tension."
But Mr Johnson maintained his uncompromising stance on Brexit, saying in a televised speech that he would rather be "dead in a ditch" than go to Brussels.
Mr Corbyn wants to speak with him in a phone call. Ian Blackford, the Lib Dems' Jo Swinson and Plaid Cymru's Liz Saville Roberts among others.
After this, the PM wants to make a fresh attempt to call an early election. The government wants to succeed.
His first attempt on Tuesday night failed to come to an end in the context of the 2011 Fixed Term Parliaments Act. Hundreds of MPs abstained in the vote, with 298 voting in favor and 56 against.
The cross-party bid to require the PM to ask for a Brexit extension if there is a deal in the cleared the commons on Wednesday, and is due to complete its progress through the Lords on Friday.
On Thursday, Mr Johnson What's the difference between Brexit contingency planning and Jacob Rees-Mogg?
David Nicholl, a consultant neurologist who helped write the Government's Operation Yellowhammer plan, with disparate anti-vaxxer Andrew Wakefield.
Chief medical officer Professor Dame Sally Davies wrote to the author Brexiter to express her "sincere disappointment" about the "disrespectful way" he spoke about the doctor in the commons.
West Yorkshire Police and Crime Commissioner Mark Burns-Williamson was among those critical of the PM for having left behind him during the political speech.
"There is no way that police officers should have formed the background to a speech of that nature," he said.
In Aberdeenshire on Friday Mr Johnson wants to say he'll receive an extra £ 51.4 million over the next two years, in addition to the £ 160 million announced in Wednesday's spending round.