Leo Varadkar said that the result of the vote in the House of Commons reduces the likelihood of a no-deal Brexit.
MPs want to delay the UK leaving the EU until at least the end of June. The motion by the British government was approved by 412 votes to 202.
He said: "There seem to be two emerging options: ratification of the withdrawal agreement followed by a short extension into the summer, or a much longer extension that would give the UK time and space to decide what they want to do, including considering options that had been taken off the table like participation in the customs union and single market.
He said a long extension would give the UK a "long reflection period" about the kind of Brexit it wants and may facilitate a fundamental rethink, or it may not. He said Mrs May is providing a stark option to accept a deal by next Wednesday and face a short extension of time to leave the EU, or to not agree a withdrawal agreement and face a much longer wait for Brexit.
MPs voted in favour of an amended motion last night, which rejected the UK crashing out of the European Union without a deal at any time under any circumstances.
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