Swedish Air Force Historic Flight is an association that flies former Swedish Air Force aircraft and maintains them in an airworthy condition. They perform regurarly outside of Sweden as well, making an airshow more interesting. The offical site of the Swedish Air Force Historic Flight shared their 2018 season program not long ago, some highlights:

At the moment the Gdynia Aerobaltic and the Flygvapnets huvudflygdag F 16 at Uppsala will be the programs where most of the types will be in the air. RIAT needs to be confirmed for such a spectacle.

IMPORTANT!!! The airshows with green are the ones which was confirmed by the Swedish Air Force Historic Flight! Programs and the jets availabilty can change during time!