Games similar to WWII Online include War Thunder, which has a free version. Other options are World of Warships, World of Tanks, DCS: World and World of Warplanes. In total there are six Flight Simulators like WWII Online for Windows, Mac, Linux, the web and Android.
War Thunder is a multiplayer online game combat flight game developed by Gaijin Entertainment for Linux, Microsoft Windows, Mac OS X, and PlayStation 4.
Hungary
EU
World of Warships is a team-based MMO (massively multiplayer online game) dedicated to ship warfare in the mid-20th century.
CyprusEU
World of Tanks is a team-based MMO (massively multiplayer online game) dedicated to tank warfare in the mid-20th century.
CyprusEU
Digital Combat Simulator World (DCS World) 2.8 is a free-to-play digital battlefield game.
Switzerland
World of Warplanes is a team-based MMO (massively multiplayer online game) dedicated to plane warfare in the mid-20th century.
CyprusEU
Denmark