There were emotional scenes after the plane carrying the five freed prisoners, including Briton Morad Tahbaz, landed in Virginia.
Five people released from Iran in a controversial prisoner swap deal with the US have touched down on American soil.
The prisoners were freed after President Joe Biden agreed to the release of almost $6bn (£4.84bn) in frozen Iranian assets.
Conservationist Morad Tahbaz – who has British, US and Iranian citizenship – was released alongside four other US-Iranian dual nationals including businessmen Siamak Namazi and Emad Sharghi.
They tearfully hugged loved ones during an emotional reunion at an army airfield at Fort Belvoir in Virginia.
The former prisoners also posed for a photograph with their families, calling out “freedom!”
Their arrival, in the early hours of Tuesday morning, prompted applause and cheers from people on the ground.
Mr Namazi, the first to leave the jet, paused for a moment, closed his eyes and inhaled deeply.
‘The nightmare is finally over’
Close friends and family, some holding small American flags, embraced them and exchanged greetings in both English and Farsi, the main language spoken in Iran.
Mr Namazi’s brother Babak, who was joined at the airport by his father Baquer, a former detainee in Iran, said: “The nightmare is finally over.
“We haven’t had this moment in over eight years,” he added. “It’s unbelievable.”
Mr Sharghi’s sister Neda presented him with a US flag and a toy stuffed animal she gave to their father 30 years ago when he had bypass surgery, a family representative said.
They were all jailed on spying charges at Iran’s notorious Evin prison, where Nazanin Zaghari-Ratcliffe was held.