Also read: Highlights of Barack Obama's three-day visit
"Thank you @NarendraModi for a memorable visit, and to the Indian people for their warm welcome. #India -bo," said a tweet by the White House.
Obama, along with wife Michelle, was on a three-day visit to India that concluded on Tuesday.
He was the chief guest at the 66th Republic Day parade here. Obama addressed 2000 people at the Siri Fort auditorium today where he interacted with the members of the audience after his speech.
Meanwhile, PM Narendra Modi too tweeted and bid farewell to Obama.