Strong investor interest is expected, following a popular secondary offering this year by Ryanair, a Dublin-based rival.
Donaldson, Lufkin & Jenrette and UBS Warburg will act as joint co-ordinators for the autumn flotation.
The initial public offering could value the airline at about £500m (E823m) on a float of 25% of the company.
Employees will at the same time be offered options equivalent to about 15% of equity, but majority control will remain in the hands of founder Stelios Haji-Ioannou and his siblings.
In addition to a listing on the London Stock Exchange, Easyjet is considering a Nasdaq quotation in an effort tap interest among US investors in the low-cost airline sector.