Ryanair will launch a total of nine new routes from Manchester, Liverpool and East Midlands airports in summer 2013, adding capacity for up to one million new passengers.
Five new routes - Corfu, Krakow, Lanzarote, Paphos and Trapani - will be served from Manchester, with Ryanair hoping to attract 360,000 new passengers.
Liverpool airport will see two new Ryanair routes next summer - Lublin and Zadar - boosting annual seat availability at the airport by 180,000.
At East Midlands airport, Ryanair will add services to Marseille and Menorca as well as boosting frequencies on 17 other routes. The airline says it expects to carry 460,000 additional passengers from the airport in 2013.
Ryanair will operate the increased northwest services by basing two additional aircraft at Manchester and East Midlands airports.
Under the new summer schedule, the low-cost carrier will operate a total of 34 routes from Manchester airport; 39 routes from Liverpool airport; and 38 routes from East Midlands airport.