FlightGear vs X-Plane 11: compare cost, realism, scenery, VR and add-ons, plus X-Plane 12 and Microsoft Flight Simulator alternatives.
FlightGear is genuinely free and open source; X-Plane 11 is a paid, legacy-generation simulator superseded by X-Plane 12. New buyers should verify X-Plane 11’s availability, price and supported platforms before purchasing. This compares the base simulators—not freeware aircraft or scenery, which do not make X-Plane itself free.
FlightGear vs X-Plane 11 differences at a glance
Both are general-purpose desktop flight simulators, but FlightGear prioritises open access and configurability while X-Plane 11 provides a more cohesive commercial package. X-Plane 11 remains useful for established installations, though it is no longer the obvious X-Plane choice for a new buyer.
| Area | FlightGear | X-Plane 11 |
|---|---|---|
| Price and licence | Free, open-source software with no compulsory subscription | Paid, closed-source software; a licence is required beyond the demo |
| Product status | Actively developed community project | Legacy generation superseded by X-Plane 12 |
| Desktop platforms | Windows, macOS and Linux | Released for Windows, macOS and Linux; verify availability and support before buying |
| Flight dynamics | Aircraft can use different engines, most commonly JSBSim or YASim | Core blade-element-based model driven by aircraft geometry and configuration data |
| Aircraft quality | Large community fleet with substantial variation in systems depth and finish | More consistent default package and a mature freeware and commercial catalogue |
| Scenery | TerraSync can retrieve scenery while flying; regional detail varies | Global scenery installed by region, with extensive custom-scenery support |
| VR | Possible with suitable builds and configuration, but not as turnkey | Integrated VR support on compatible Windows hardware |
| Best reason to choose it | Zero-cost flying, Linux use, source access and experimentation | An existing X-Plane 11 library, established procedures or compatible VR equipment |
A free demo does not make X-Plane 11 freeware. Our guide to the X-Plane 11 demo and paid licence explains what can be tested before purchase.
Is FlightGear even free?
Yes. FlightGear’s simulator software is genuinely free to download, use, inspect and modify under its open-source licence, without a trial timer or compulsory subscription.
Optional distribution services or third-party material may carry their own terms, and not every community aircraft or scenery package necessarily uses the same licence. That does not change the cost of the core simulator. Readers ready to try it can use our FlightGear download and supported-platform notes.
The reverse distinction matters too: finding a free aircraft, livery or airport for X-Plane does not remove the need for a valid X-Plane base licence.
Is FlightGear as realistic as X-Plane 11?
FlightGear can be as convincing as X-Plane 11, but realism depends heavily on the individual aircraft rather than the simulator name. Aerodynamics, engine modelling, avionics, failure logic and cockpit procedures can all differ between two aircraft running in the same simulator.
X-Plane 11 applies its aerodynamic framework consistently, giving developers a familiar basis for tuning an aircraft. FlightGear permits several flight-dynamics engines and deeper experimentation. That freedom supports excellent models, but it also creates wider variation between community aircraft.
Judge a model against documented behaviour: take-off distance, climb rate, cruise power, stall characteristics, trim response, fuel flow and systems logic. Cockpit appearance alone says little about aerodynamic accuracy, while a sophisticated flight model does not guarantee that the electrical, hydraulic or navigation systems are complete.
Neither product automatically qualifies an ordinary home installation for logged flight training. Regulatory approval applies to a specified combination of software, hardware, controls, configuration and operating conditions—not simply to the FlightGear or X-Plane name.
Which has better scenery and add-ons?
X-Plane 11 has the more established add-on catalogue, while FlightGear offers open access to worldwide community scenery without purchasing the base simulator. For easy, globally consistent photoreal flying, neither matches Microsoft Flight Simulator’s streamed-world approach.
FlightGear’s TerraSync system downloads nearby scenery into a local cache. Missing terrain often means the cache is unwritable, the scenery path is wrong, the required tile has not finished downloading or the connection is too slow. Once stored locally, those tiles can be reused without downloading them again.
X-Plane 11 installs global scenery by region and reads third-party packages from Custom Scenery. The order in scenery_packs.ini matters: airports normally sit above overlays, with orthophoto base layers below both. Large photographic packages can consume far more storage than the simulator itself.
The mistake we see repeatedly is treating every package labelled “X-Plane” as interchangeable. X-Plane 11 aircraft, X-Plane 12 aircraft and Microsoft Flight Simulator packages use different formats and are not interchangeable. Even between X-Plane 11 and 12, an aircraft or plugin may depend on generation-specific systems, datarefs or compiled binaries. Our installation guide for X-Plane aircraft, scenery, plugins and liveries covers the correct folder conventions.
FlightGear vs Microsoft Flight Simulator: which is better?
FlightGear is better for zero-cost, open-source and Linux use; Microsoft Flight Simulator is better for a highly detailed streamed world, console access and a larger commercial ecosystem. Microsoft Flight Simulator 2020 and MSFS 2024 differ in platform coverage and dependence on online services.
| Area | FlightGear | Microsoft Flight Simulator 2020 | Microsoft Flight Simulator 2024 |
|---|---|---|---|
| Purchase or subscription | Free with no compulsory account subscription | Sold in paid editions; access may also be included through a qualifying Microsoft subscription | Sold in paid editions; subscription availability depends on platform and catalogue |
| Platforms | Windows, macOS and Linux | Windows PC and Xbox; never released on PlayStation | Launched on PC and Xbox Series X|S on 19 November 2024, then PS5 and PS5 Pro on 8 December 2025 |
| Visual world | Traditional generated scenery with TerraSync delivery; quality varies by region | Streamed aerial imagery, elevation data and photogrammetry where available | More cloud-streamed world and content delivery, with updated terrain and environmental presentation |
| Flight and systems modelling | Multiple flight-dynamics engines; aircraft quality varies widely | Modern aerodynamic simulation, but handling and system depth still depend on each aircraft | Develops the MSFS aerodynamic and systems framework further; aircraft implementation remains decisive |
| VR | Configuration-dependent rather than a uniform turnkey feature | PC VR support; Xbox has no VR mode | PC VR support; PSVR2 support arrives through a free update in 2026 |
| Hardware | Scales to modest PCs, though complex aircraft and effects can still be demanding | Generally requires stronger graphics hardware and benefits from a fast connection | Heavy world streaming and modern rendering place greater demands on the PC and network; console peripherals must match the console platform |
| Offline use | The simulator and locally stored aircraft and scenery work offline; TerraSync requires a connection to fetch new tiles | Installed offline data can support reduced offline flying, but streamed detail, live weather and online services are lost | More dependent on streaming than the 2020 release, so content and features are more restricted without a reliable connection |
| Add-ons | Community-led and highly editable, with uneven documentation | Large freeware, commercial and in-simulator marketplace ecosystem | Growing ecosystem with some 2020 content carried forward, but compatibility must be checked package by package |
Microsoft Flight Simulator’s strongest advantage is immediate visual coverage. A fast connection can supply aerial imagery, cloud data and detailed cities without the user building a huge orthophoto library. FlightGear gives the user more control over local files and source code, but its default scenery is less visually consistent.
Flight modelling is not a simple win for either side. A carefully developed FlightGear aircraft can outperform a lightly implemented MSFS aircraft in handling or systems fidelity. Conversely, a detailed MSFS aircraft can provide deep navigation, failure and cockpit procedures that many FlightGear models do not attempt.
For hardware, PC users have the widest choice of yokes, pedals, throttles and VR headsets. Console users should verify accessory compatibility before buying because a USB flight controller that works on a PC is not automatically supported on Xbox or PlayStation.
Which simulator should you choose?
The right choice follows your budget, operating system, existing add-ons and preferred type of flying.
| Simulator | Choose it when | Main caution |
|---|---|---|
| FlightGear | Your budget is zero, you require Linux or open-source access, or you want to modify flight models and simulator code | Aircraft, scenery and documentation are less consistent than in a curated commercial package |
| X-Plane 11 | You already own compatible aircraft, scenery or plugins, or need a stable installation built around them | It is a legacy generation; verify that it is still the sensible purchase for your platform before investing |
| X-Plane 12 | You want the newer X-Plane generation, Linux support or serious procedural flying with a suitable high-fidelity aircraft | X-Plane 11 add-ons do not automatically transfer, and demanding weather or scenery can require stronger hardware |
| Microsoft Flight Simulator 2020 or 2024 | You prioritise photoreal world flying, streamed scenery, a broad add-on market or console use | It is paid, depends more heavily on online services and requires version-specific compatibility checks |
New X-Plane buyers should compare generations rather than assuming the older version offers better value. Our side-by-side explanation of the X-Plane 11 and X-Plane 12 changes covers weather, lighting, aircraft and add-on compatibility.
“Serious procedural flying” also requires the right aircraft. A simulator may support realistic navigation and failures, but a simplified default aeroplane will not reproduce every checklist, circuit breaker or flight-management function.
Why can a first comparison be misleading?
Controller conflicts, unfinished scenery downloads and unsuitable add-ons cause many poor first impressions. Establish a clean baseline before deciding that one simulator has bad handling or performance.
- Bind each axis only once. A joystick, gamepad and throttle all assigned to pitch or power can produce oscillation, unwanted throttle movement and impossible trimming.
- Start with a default aircraft. Test in clear weather at a standard airport with third-party plugins disabled. This separates the simulator from a faulty or demanding add-on.
- Confirm the scenery is present. Check FlightGear’s TerraSync cache and download status. In X-Plane, inspect
Custom Sceneryand the order inscenery_packs.ini. - Match the package to the exact simulator. Check the X-Plane generation, MSFS release, operating system and processor support before installing aircraft or plugins.
- Change one performance setting at a time. Object density and complex aircraft often expose a CPU limit, while resolution and anti-aliasing usually place more pressure on the GPU. Streaming stalls may instead indicate a network or cache problem.
The verdict: FlightGear vs X-Plane and Microsoft Flight Simulator
For FlightGear vs X-Plane, choose FlightGear when free, open-source or Linux support is the priority. Choose X-Plane 12 for a new paid X-Plane installation focused on a cohesive desktop experience and serious procedural aircraft. Choose X-Plane 11 mainly when you already depend on its compatible add-ons or hardware setup.
For anyone asking “is it even free?”, the answer is yes: FlightGear’s base simulator is genuinely free, not merely a limited demo. Optional third-party content does not change that.
For FlightGear vs Microsoft Flight Simulator, choose FlightGear for source access, local control and no purchase cost. Choose MSFS 2020 or 2024 for streamed aerial scenery, photogrammetry, console flying and its larger commercial ecosystem, after checking platform, edition and internet requirements.
None of these recommendations means that an ordinary consumer installation is approved for logged flight training. That requires an appropriately qualified complete training device, not just realistic software.