The offical site of the Gdynia Aerobaltic 2019 confirmed that the ukranian Su-27 will perform at the airshow. Both dynamic and static display. Also, a Il-76 and a Su-24 is confirmed for static display as well.
Gdynia Aerobaltic 2019 will offer multiple attractions for whole families. Attraction will be divided into two areas: Gdynia City Beach and Gdynia Kosakowo Airport. Dozen of hours of dynamic displays, abundant static display at the airport, kids area, gastronomical area and many more!
The official RIAT website also confirmed the Su-27 display, fans in the UK can see the mighty jet again:
The Flanker is back. That’s right, the Ukrainian Air Force is returning to RIAT for the third year in a row to fly the mighty Sukhoi Su-27! The air arm is also bringing one example for the static display alongside an Il-76 ‘Candid’ transporter.