Learn when a free AIRAC update is legal, how to update MSFS and PMDG navdata, where downloads go wrong and how to verify the installed cycle.
Yes. Legal free AIRAC updates exist for some flight simulators and aircraft, including navigation data delivered through official Microsoft Flight Simulator updates. The catch is compatibility: a package must be licensed for the exact simulator, aircraft or avionics database. A copied commercial cycle or AIRAC crack is not a legal free download.
This applies across general civilian flight simulators, including Microsoft Flight Simulator 2020 and 2024, X-Plane, FSX, Prepar3D and FlightGear. The correct update is determined by the database your cockpit actually reads, not simply by the name of the simulator.
What does a free AIRAC cycle actually update?
An AIRAC cycle updates coded aeronautical information used for route planning and navigation procedures.
AIRAC stands for Aeronautical Information Regulation and Control. A new cycle normally becomes effective every 28 days. Our explanation of AIRAC scheduling and cycle matching in flight simulators covers why planners, aircraft and charts can disagree even when each one works correctly.
- Waypoints, radio navigation aids and airways
- Airport, runway and navigation records
- SIDs, STARs, approaches and transitions
- Altitude, speed and course constraints
- Procedure legs supported by the receiving avionics
AIRAC data does not update terminals, taxiways, terrain, satellite imagery or the visible airport scenery. If a real runway has been renumbered, new navdata may use the new designation while the scenery still displays the old number.
One installation can also contain several independent databases. The simulator map, built-in GPS, add-on FMC and external flight planner may each show a different cycle.
Which free AIRAC update sources are legal?
A free AIRAC source is legal when its owner or authorised distributor permits you to obtain and use that data for the intended product.
| Source | Use it when | Main limitation |
|---|---|---|
| Navigation data included with official simulator servicing | The aircraft uses the simulator's native database | It may not match an external planner or aircraft-specific database |
| Data bundled or approved by the aircraft developer | The FMC or GPS maintains its own database | The included cycle may be old and usually cannot be copied to another product |
| Community or public-authority data with explicit reuse rights | Your simulator supports its coverage, format and licence | Raw data may lack worldwide coverage or complete procedure coding |
| Licensed legacy freeware packages | You need a compatible cycle for older software | The data will often be unsuitable for present-day routes and charts |
Data can be included at no additional charge without being free to redistribute. Publicly viewable aeronautical information is not automatically public domain either. The source data, converted files and installer can each have separate licence terms.
Can you update MSFS AIRAC free?
Microsoft Flight Simulator 2020 and 2024 receive native navigation data through official simulator and content servicing without a separate AIRAC purchase.
Keep the simulator and official content updated, then check the cycle shown inside the aircraft. There is no universal AIRAC button that updates every add-on. Some aircraft read the MSFS database; others maintain private data that official simulator updates do not replace.
On PC, an older package in the Community folder can override or conflict with newer data. Remove obsolete navdata packages rather than merging them. Console editions do not expose the same manual Community-folder workflow, so updates must use supported simulator or add-on delivery methods.
For the platform-specific checks, see our MSFS navdata update and compatibility guidance.
Can you get a PMDG AIRAC update free?
A legal free PMDG AIRAC update is available only when the relevant cycle is bundled with the aircraft, supplied through an authorised promotion or explicitly provided for that PMDG product.
PMDG aircraft generally use an aircraft-specific navigation database rather than treating every MSFS navdata update as an FMC update. Installing a newer aircraft build therefore does not guarantee a newer AIRAC cycle. Product generation and simulator version matter, so use only the update format supported by that exact aircraft.
Check the FMC identification or navigation database page for the installed cycle and validity dates. For an up-to-date cycle, the normal route is a licensed navdata service supported by the product. Copying a paid database from another user's installation, downloading a shared archive or moving files between unrelated PMDG products does not make it freeware.
Where can you get the latest AIRAC cycle download legally?
There is no single legal latest AIRAC cycle download that works with every simulator, planner, GPS and FMC.
Use the simulator's official updater for native avionics, the aircraft developer's approved method for a private FMC database, or a licensed navdata installer that names your exact product. Before downloading anything described as the latest cycle, verify that it provides:
- The four-digit AIRAC cycle identifier
- The effective-from and effective-to dates
- The supported simulator, aircraft or avionics format
- The data owner or a clear redistribution licence
- Installation, update and removal instructions
A file name containing latest_airac proves nothing. Unidentified worldwide data with no provenance or licence should not be installed, even if several mirrors offer the same archive.
What does an AIRAC cycle 2026 download mean?
An AIRAC cycle 2026 download must identify one specific 28-day cycle, not a single annual 2026 database.
AIRAC identifiers use two digits for the year followed by the cycle sequence. For example, 2601 identifies the first AIRAC cycle numbered for 2026. A package labelled only as 2026 is too vague because procedures can change repeatedly during that year.
Do not assume the highest-looking file name is active. Compare its published effective dates with the cycle displayed by the aircraft, and make sure the package format matches the intended avionics.
Are AIRAC distros, mirrors and AIRAC cracks legal?
An AIRAC distro or mirror is legal only when the distributor has permission to host and redistribute the files.
The word distro describes a distribution package; it says nothing about licensing. An AIRAC crack normally attempts to bypass payment, account or installer restrictions and is not a legitimate free update. Such archives can also contain altered databases, incomplete files or unwanted software, making them unsafe as well as unauthorised.
We do not provide copied commercial cycles, licence bypasses or unofficial mirrors. If the archive does not identify its data owner and redistribution rights, reject it.
How do X-Plane, FSX and Prepar3D AIRAC updates differ?
Each simulator stores base navigation information and aircraft-specific data differently, so a package for one platform cannot simply be renamed for another.
X-Plane
X-Plane includes navigation data and supports compatible replacement data through its Custom Data structure. Many aircraft use that database, but some advanced or older add-ons require a separate folder or legacy format.
Install a package prepared for the relevant X-Plane generation. Do not merge individual files from different cycles; mixed airport, airway and procedure records can produce faults that are harder to diagnose than a consistently old database.
FSX and Prepar3D
FSX and Prepar3D can have separate scenery, default GPS, navaid and add-on FMC databases.
A scenery or navaid update may improve the simulator map without changing an airliner's FMC. Likewise, installing FMC navdata does not move runways or correct visual airport scenery. Our guide to FSX's separate navigation databases explains which component must be updated.
FlightGear and other free simulators
A free simulator can use legally distributed navigation data, but its software licence does not automatically make every compatible AIRAC database free.
Use the release and format designated for the simulator. Confirm coverage and effective dates before relying on community conversions, particularly when procedure data has been generated from several regional sources.
How should you install a legal AIRAC update?
Identify the database in use and preserve the working installation before changing any navdata files.
- Identify the consumer. Determine whether the route is being read by the simulator, aircraft FMC, GPS add-on or external planner.
- Record the installed cycle. Note the four-digit identifier and validity dates shown by the avionics.
- Confirm rights and compatibility. Check that the package is licensed for the exact simulator, aircraft and software generation.
- Close the simulator and back up the database. Preserve the complete working folder rather than a few selected files.
- Remove conflicting overrides. Disable the previous third-party package when the instructions require replacement rather than an in-place update.
- Install one package only. Never combine providers, formats or cycles unless the product documentation explicitly instructs you to do so.
- Restart and rebuild indexes. Allow the aircraft or simulator to recreate any documented cache.
- Verify in the cockpit. Confirm the cycle, then load a known departure, airway and approach before planning a long flight.
The mistake we see most often is verifying the simulator's world map but not the aircraft's own database page. The cockpit display is the decisive check for an aircraft-specific FMC.
Why does the FMC still show old or missing procedures?
An FMC usually remains out of date because the update changed a different database, a conflicting package has priority or the route was created against another cycle.
- Wrong database updated: the simulator map changes while the add-on FMC continues reading its private database.
- Duplicate package: an old override, load-order entry or partially removed package takes priority over the new data.
- Planner mismatch: different cycles create unknown waypoints, route discontinuities, missing transitions and renamed procedures.
- Outdated scenery: navdata uses a new runway number or threshold while the airport model still depicts the previous layout.
- Unsupported procedure leg: older avionics may not interpret every modern leg type, even when the database itself is valid.
- Expired but installed cycle: an out-of-date warning means the validity period has passed; it does not necessarily mean the files failed to load.
If removing a suspected package fixes the problem, reinstall only the correct format and let the avionics rebuild its index. Do not copy missing files individually from another cycle.
Do you need the latest AIRAC cycle?
You need a recent licensed cycle when matching active charts, present-day dispatch routes or organised online operations matters; for offline flying, consistency can be more useful than absolute recency.
An older legal cycle can work well when the planner and aircraft use the same data. Historical flying may be more accurate with period-appropriate procedures and runway designations. If you use live charts, review our guidance on obtaining legal charts and matching them to installed navdata.
The practical rule is simple: use included updates for native avionics, developer-approved data for aircraft-specific systems and community packages only when their licence and compatibility are explicit. A commercial cycle does not become freeware because somebody renamed, mirrored or cracked it.