Aircraft family
737-300 / 400 / 500
Choose the Classic variant that fits your mission: the universal 737-300, the stretched 737-400, or the 737-500 for low-demand feeder routes.
Take Command of the 737 Classic
Experience the true workhorse of the 90s and 2000s with the CSS 737 Classic for Microsoft Flight Simulator, offering fully external study-level systems, an era-accurate FMC with LNAV and VNAV, flight dynamics tested by real pilots and a fully custom EFB with Navigraph and SimBrief integration.
The workhorse of a Millenium
The CSS 737 Classic family brings the 737-300, 737-400, and 737-500 into Microsoft Flight Simulator 2020 and 2024 with features such as FMC U5.0 with SimBrief route uplink capabilities, DME/DME/IRU navigation, LNAV/VNAV, Autoland, Weather and Terrain radars, icing simulation, working wipers, a customizable virtual crew and much more.
Explore→
Classic cockpit philosophy
A hands-on flying experience
This airplane is more demanding than the jets of our era - with CRT displays, early digital gauges, a more manual workflow and a lack of GPS presenting a rewarding challenge to the modern simmer.
CSS Launcher
Seamless purchase, installation and updating
Use the CSS Launcher to manage your license, aircraft installs, updates, documentation, and support tickets from one place.
Manuals and support in one place
Discover setup guides, useful tips and tricks, troubleshooting steps and contact support without searching through separate pages
Knowledge Base
Read manuals and useful notes — Find installation instructions, aircraft features, tips and tricks and other useful information.
Open Knowledge Base→Support Center
If you run into an issue — Find Frequently Asked Questions and contact links for our Communities and Support staff.
Get Support→Check out Update Notes, Previews and Development News
View Updates→CSS News - March 19, 2026 - 1.9.0 Update released!
A major update for the 737-500, adding crew voice packs and SimBrief route uplink capabilities.
CSS News - March 14, 2026 - New update coming very soon!
Announcing an update with some highly anticipated new features!
CSS News - January 16, 2026 - Even more V2 previews!
More beautiful previews of the V2 model!
CSS News - January 11, 2026 - Version 1.7.8 + new liveries now available!
A new update with important fixes!
Join our Community
Become a part of the CSS Community by joining the CSS Software Discord server and subscribing to the CSS Software YouTube channel.
Ready for departure?
Download CSS Launcher, install the 737-500, choose your access option, and keep the aircraft updated from one place.