Launching the Brexit Party's election campaign here, Farage said that bringing political parties together was the "only way" forward, BBC reported.
Farage warned Johnson that if he rejected his offer, the Brexit Party would field candidates on "every single seat" in England, Scotland and Wales.
The Conservatives have consistently denied to form an alliance with the Brexit Party.
Condemning Johnson's Brexit deal, the Brexit Party leader urged him to drop it "because it is not Brexit".
Farage's statement comes after US President Donald Trump urged Farage and Johnson to team up as "an unstoppable force".
The British PM negotiated a deal with the European Union (EU) and tried to get it through the UK Parliament in three days to pass it before the Brexit deadline of October 31.
While, UK MPs voted it through its first hurdle in the House of Commons, they voted against the short timetable - leading to a further delay to the country's departure from the EU, to January 31, 2020.
Farage has criticised Johnson for failing to deliver on his promise that the Britain would leave the EU by Oct 31. Instead, he wants Johnson to pursue a free trade pact with the EU similar to the bloc's deal with Canada and to impose a new Brexit deadline of July 1, 2020 to get it signed off.
( With inputs from IANS )