Ukrainians are widely expected to give a resounding endorsement to the overthrow of their last elected leader by voting for presidential candidates promising close ties with the West, in defiance of Russia's Vladimir Putin.
But the absence of more than 15 percent of the electorate, in Russian-annexed Crimea and two eastern regions where fighting with pro-Moscow rebels continued on Saturday, may mar any result.
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Passengers, including a pregnant woman, say they have been stranded since 4pm yesterday.
The boxer said it was the "least he could do" and even donated the £30,000 shorts he wore in his last fight against Devon Alexander.
By Sunday it should become drier with spells of winter sunshine but temperatures will still remain on the cool side.