Nazanin Zaghari-Ratcliffe and Anoosheh Ashoori have arrived in the UK, touching down at RAF Brize Norton in Oxfordshire at 1:08am.
Mrs Zaghari-Ratcliffe spent six years detained in Iran after being accused of plotting to overthrow the government – but will now be reunited with her husband and seven-year-old daughter.
Also on the plane is Anoosheh Ashoori, who had been held in Iran since 2017 on spying charges.
Long-running efforts to free them paid off yesterday when Foreign Secretary Liz Truss confirmed they were heading home.
The breakthrough came after Britain paid £393.8m to settle a debt related to a tank order placed by Iran in the late 1970s.
Mrs Zaghari-Ratcliffe denied Iran’s allegations and her husband Richard fought a high-profile campaign to free her, which included a hunger strike.
Read more: Nazanin Zaghari-Ratcliffe: The six-year fight for freedom
The Britons flew into the UK via a stop in Oman, where the country’s foreign minister posted a picture of the pair getting off the plane.