Below is for moving one packages.

dtutil /FILE <name>.dtsx /DESTSERVER SQLServer /COPY SQL;<name>

OR

dtutil /MOVE SQL;destPackage /SQL srcPackage /SOURCEUSER srcUserName /SOURCEPASSWORD $Hj45jhd@X /DESTUSER destUserName /DESTPASSWORD !38dsFH@v

Likewise you need to put all in a for loop.

However I got one more solution for you hope that also work.

1. Open MS Visual Studio, and create a new Integration Services project if you already don’t have one.

2. In the solution Explorer under SSIS packages - right click on the folder – Add existing packages (add original packages)

3. Right click on the project – Property. Specify the output path for your build. Click on Deployment utility and set “Create DepoloymentUtility” to true. Specify the output Path. Click OK.

4. Right click on the project – Build. The packages with a deployment utility should be under the directory specified in step 3.

5.Copy the entire deployment folder and paste it to the server you want to move the packages to.

6. Log in to the server and navigate to the directory made in step 5. Double click on the xxx.SSISDeploymentManifest file to initiate the deployment wizard.