When an MSFS SimBrief flight plan not importing or not updating issue appears, it can prevent accurate routing, fuel planning, and navigation data from loading correctly inside the simulator. If you’re still learning how flight planning, routing, and navigation setup work together, our How to plan better flights guide explains the core preparation steps that help ensure flight plans transfer smoothly into Microsoft Flight Simulator..
In most cases, SimBrief itself is working correctly. The problem is usually caused by account linking, outdated data, or how the aircraft pulls SimBrief information.
This guide explains why SimBrief imports fail and what usually fixes it.
Common Signs of SimBrief Import Problems
You may notice one or more of the following.
• SimBrief route does not appear in the aircraft
• Old flight plan loads instead of the new one
• Fuel or payload values are incorrect
• Import button does nothing
• Waypoints are missing or incomplete
These issues are almost always configuration-related.
Make Sure Your SimBrief Username Is Correct
The most common cause is an incorrect SimBrief username.
Many aircraft require your SimBrief username, not your email address.
Check the following.
• SimBrief username is entered correctly
• No extra spaces before or after the name
• Username matches exactly what SimBrief shows
If the username is wrong, the aircraft cannot retrieve the correct flight plan.
Refresh the Flight Plan in SimBrief
If you recently edited your flight plan, the aircraft may still be loading an older version.
Before importing, make sure you.
• Regenerate the flight in SimBrief
• Save the updated plan
• Confirm the correct aircraft and route
If the plan is not regenerated, the import may pull outdated data.
Aircraft Must Be in the Correct State
Some aircraft require specific conditions before SimBrief import works.
Common requirements include.
• Aircraft powered on
• Avionics or FMC fully initialised
• Engines off for cold and dark states
Trying to import too early can cause the process to fail silently.
Check Navigation Data Compatibility
If navigation data is out of sync, routes may not import correctly.
This can happen when.
• SimBrief uses newer AIRAC data
• The aircraft uses older navigation data
• Waypoints or procedures do not exist
Using the same AIRAC cycle in both SimBrief and the aircraft greatly improves reliability.
SimBrief Import Is Aircraft-Specific
Not all aircraft handle SimBrief imports the same way.
Some aircraft.
• Import only the route
• Ignore fuel and payload
• Require manual confirmation steps
If SimBrief works in one aircraft but not another, the issue is likely aircraft-specific rather than a general MSFS problem.
Restart the Aircraft or Simulator
SimBrief data can become cached.
If an import fails.
• Reload the aircraft
• Restart MSFS if necessary
• Try importing again
This often clears stale data and restores normal behaviour.
Online Services Must Be Active
SimBrief imports require an active internet connection.
Check that.
• Online services are enabled
• You are not in Offline Mode
• MSFS has not lost connectivity
Temporary connection drops can prevent imports without showing an error.
Test With a Default Aircraft
If you’re unsure where the issue lies, test with a default aircraft that supports SimBrief import.
If SimBrief works there, the issue is likely.
• Add-on specific
• FMC configuration related
• AIRAC related
This helps narrow down the cause quickly.
Why SimBrief Imports Feel Inconsistent
SimBrief imports depend on several systems working together, including online services, navigation data, aircraft state, and FMC logic. Small mismatches can cause imports to fail without clear feedback.
Once usernames, data cycles, and aircraft setup are correct, imports usually work reliably.
Final Thoughts
If your SimBrief flight plan is not importing or updating in MSFS, the cause is almost always a username mismatch, an outdated plan, an aircraft state issue, or a navigation data conflict.
Confirming the correct SimBrief username, regenerating the plan, and ensuring compatible navigation data will resolve most import problems without reinstalling the simulator.
Flight-plan import problems are often related to account linking, AIRAC cycle differences, or export settings rather than simulator faults.
The official SimBrief user guide and help pages provide detailed instructions on correct export formats and integration steps, making them a useful reference when troubleshooting persistent import or update issues.