ITV, also listed on London's blue-chip index, has been searching for a successor to Adam Crozier, who left at the end of June.
McCall's departure from easyJet comes as the airline industry tackles the challenges surrounding the UK's vote to leave the European Union, terror attacks in Europe and competitive price pressures.
"I will always miss Easyjet and most of all I will miss Easyjet's people whose Orange Spirit helps them do their best to make travel easy and affordable for their customers every day", said McCall.
Peter Bazalgette, who as chairman of ITV led the recruitment process, said: "In a very impressive field of high-calibre candidates, Carolyn stood out for her track record in media, experience of an worldwide operation, clear strategic acumen and strong record of delivering value to shareholders".
The U.K.'s largest free-to-air commercial broadcaster passed over a "very impressive field of high-caliber candidates", to select McCall, according to Chairman Peter Bazalgette.More news: Worried Blues? Conte no closer to agreeing new Chelsea contract
He added: "I'm delighted we'll be working together at ITV". "EasyJet is a structural victor in a brilliant position, and I look forward to being a loyal customer in the years to come".
However, since joining EasyJet in July 2010 McCall had overseen a steady rise in share price rise of more than 200pc, or 914p, to 1347p.
McCall was said to have been chosen as the preferred candidate for the ITV top job at the end of last month, but reports have said that disagreements about her salary package had slowed things down. "She will also be able to participate in the company's existing annual bonus plan up to a maximum of 180 percent of salary, and the long-term incentive plan up to 265 percent of salary", the company said.
"This was a really hard decision for me to make", she said.
easyJet is setting up a new Vienna-based airline to continue its operations after Brexit. I have had an fantastic seven years at EasyJet, I am so proud of what the airline and its people have achieved in that period.
Bloomberg quoted Daniel Roeska and Caius Slater, analysts for Sanford C. Bernstein, as saying in a note yesterday that easyJet's next CEO must "increase focus on cost management and possible restructuring".