Maryam Nawaz tweeted a photo of her hugging her distraught daughter and son before leaving for her flight, with the caption: "Goodbyes are hard, even for the grown-ups".
Sharif was ordered jailed after failing to explain how the family acquired the London flats in a case stemming from 2016 Panama Papers revelations that showed they owned the apartments through off-shore companies.
NAB has acquired two helicopters-one at Lahore's Allama Iqbal International Airport and the other at the New Islamabad International Airport to transport the two convicts. Ministers in the provincial government have said only anti-social elements have been detained and police have placed shipping containers across the city to block roads to prevent protesters reaching the airport.
Underscoring the tensions gripping Pakistan in the run-up to the poll, a suicide bomber had killed more than 100 people at an election rally a few hours earlier, in the deadliest such attack in the country in more than three years. Sharif's son-in-law is now serving his one-year prison sentence on the same charge, which stems from the purchase of luxury apartments in Britain that the court said were bought with illegally gotten money.
The former prime minister and his daughter were in London, where Sharif's wife Begum Kulsoom is undergoing treatment for cancer. Nawaz and Maryam will then be directly transported to the Adiala jail in Rawalpindi.
On Friday, some of Sharif's supporters clashed with police in Lahore.
"But I want the Pakistani nation to know that I am doing this for you", Sharif said in a video. Disgraced ex-Prime Minister Nawaz Sharif will be whisked away by helicopter to the federal capital of Islamabad when he returns to Lahore from London to face a 10-year prison sentence on corruption charges. As per ANI, the PML (N) president said, "We thought Bangladesh is a baggage and it slipped off our hands".
Recent opinion polls suggest PML-N is losing its lead nationally to the Pakistan Tehreek-e-Insaf (PTI) party of arch-rival Khan, whose anti-corruption message has resonated with many Pakistanis.
PML-N leaders say authorities have began a crackdown against union council leaders, the street-level party workers who bring out people on the streets.