All three airports will gain an additional Airbus A320 family aircraft, growing easyJet's fleet of based aircraft at Manchester to 24, Liverpool to nine and Glasgow to seven.
EasyJet claims each new aircraft will support around 400 new direct and indirect jobs and contribute a projected £27 million to the economy.
It comes after easyJet revealed 16 additions to its network for summer 2026. Manchester will gain new links to Preveza and Montpellier, while Liverpool will get Lisbon and Paphos routes.
Glasgow, meanwhile, will gain four new easyJet routes to Malta, Pisa, Lisbon and Sharm el Sheikh.
The additions will grow Manchester's roster of easyJet routes to 89, Liverpool's to 41 and Glasgow's to 42.
EasyJet flew just shy of seven million passengers from Manchester in the year to 30 September 2025, and 2.3 million from Liverpool. It operated its largest-ever Scottish flight programme over the past year, carrying more than 8.1 million passengers.
Kevin Doyle' easyJet's UK country manager, said the additional based aircraft would "further unlock the opportunity of the demand we see for both business and leisure travel".
Over the past 12 months, easyJet has added 11 new routes from Manchester, ten from Liverpool and 15 across Scotland (Glasgow and Edinburgh).
EasyJet on Tuesday (25 November) posted its full-year results (year to 30 September), which included a 9% increase in pre-tax profits to £665 million.
It has also set a bold new profit target for its in-house operator, easyJet holidays, after the brand achieved its previous £250 million target ahead of schedule. It will now aim to break through the £450 million profit barrier by 2030.