The budget carrier will launch daily flights to Gdansk from Gatwick starting June 15.
Three-times weekly Birmingham-Krakow flights will commence on September 17, flying Tuesdays, Thursdays and Saturdays.
Economy fares lead in from £17.99 one-way, with tickets on sale now.
The announcement grows Wizz Air’s route network to 96 across 27 countries from nine UK airports.
Managing director Owain Jones: “I’m sure our customers will love exploring all the unique Polish cities of Gdansk and Krakow have to offer.