Hi James,
Thank you for your question and welcome to AirData!
Yes, you can manually link flights to a mission. This is done through the web portal at app.airdata.com
Here is how:
For more details please see our help article here:
https://app.airdata.com/wiki/Help/Mission+Planning#Link
If you have any further questions, please feel free to reach out to us at sup...@airdata.com and we will be happy to help!
Best regards,
Jordan
AirData Support