The airline has uploaded fares from 9 May to 30 September to its system and has increased capacity to all popular summer routes.
One-way fares include Manchester to Bilbao, Venice and Newquay from £29.99 and Corfu, Preveza and Sofia from £31.99.
Options from Edinburgh include Munich and Reykjavik from £31.99 and Lisbon and Naples from £34.99.
Fares from Belfast to Faro, Majorca, Ibiza and Mahon are from £29.99.
Ali Gayward, easyJet’s UK country manager, said: "With seats now available across hundreds of thousands of flights, serving 19 UK airports on over 400 routes to Europe, North Africa and the Middle East, now is a great time to book for next summer with easyJet.”
EasyJet holidays has also made “thousands more” package holidays for summer 2023 available in beach and city destinations.