She said she will reach at Lahore airport on Friday at 6.15 p.m.by Ittehad Airways' flight EY-243.
Both Nawaz Sharif and his daughter are now in London to look after Mr Sharif's wife, Begum Kulsoom Nawaz, who is suffering from throat cancer and has been on ventilator since June 14 after a cardiac arrest.
"No matter how much you try to cover it, people know the reality", Maryam said while talking to reporters in London.
Khan also used the venue to criticize former Prime Minister Nawaz Sharif, who was sentenced to 10 years in prison in absentia last week by an anti-graft tribunal over the purchase of luxury apartments in London.
"Let me make it clear that the law enforcement agencies will arrest Nawaz and Maryam at the airport to implement the court's order", he said.
Nawaz Sharif and his daughter Maryam Nawaz, who have been convicted by an accountability court in the Avenfield reference case, are scheduled to arrive on Friday July 13 in Lahore. Maryam was given 7 years imprisonment for abetment after she was found "instrumental in concealment of the properties of her father" and one year for non-cooperation with NAB.
PML-N spokesperson Marriyum Auranzeb said a large number of party workers will gather in Lahore from all provinces of the country to give "historic welcome" to Sharif and Maryam.
She vowed that getting arrested along with any other sacrifice needed under the banner of "respect to vote" will be made by the leadership or by thousands of PML-N devotees treading the same course as them. Sharif, who is in London with his ailing wife, has promised to return to Pakistan. She is suffering from lymphoma (throat cancer).