How do I submit a bug to launchpad without internet

The page that you linked has instructions under the headers Filing bugs when offline or using a headless setup and Filing bugs manually at Launchpad.net:

Filing bugs when offline or using a headless setup

In the event that you have an issue with your internet connection, want to file a bug for another system, or have trouble reporting from a headless setup, you can still do this using apport.

For a bug report about a crash, copy over the .crash file created in the /var/crash folder to the new computer. Then report it from the new computer via a terminal:

ubuntu-bug FILENAME.crash

For a bug report about any other issue, from the computer with the problem execute the following at a terminal:

apport-cli -f -p PACKAGENAME --save FILENAME.apport

Copy this over to the new computer. If filing a new report, execute via a terminal:

ubuntu-bug FILENAME.apport

Please do not attach the .apport or .crash file to the report, as this is not the same as performing the above mentioned steps.

Filing bugs manually at Launchpad.net

If for some reason you cannot file a bug using the Apport tool you can file one via Launchpad's own bug report form. When doing so it is best if you have determined which package it should be filed against. Read 'finding the right package' for guidance or use Launchpad's package search feature. We don't recommend this method for most bug reports because they will likely be missing crucial information, use ubuntu-bug if you can!

To file a bug against a specific package you can also use a URL like the following:

http://bugs.launchpad.net/ubuntu/+source/PACKAGENAME/+filebug?no-redirect

where PACKAGENAME is the name of the source package about which you want to file the bug report.

In the event that you want to request a piece of software be packaged for Ubuntu please follow the instructions in the wiki.

I am of course perplexed that you're complaining about being unable to report a bug about Ubuntu because you need an Internet connection, whilst making a report about that, clearly with an Internet connection. Well done! :D

However, it's not unreasonable to have no Internet connect on the machine with the problem, and needing to file the issue from another machine, as it appears you have done here.

As such, you can construct a URL using: https://launchpad.net/ ubuntu / +source / (packagename) / +filebug

(assuming you know the package name - which you don't mention)

This should take you to a form in which you can specify the problem, some detail regarding the ways to reproduce the issue and any pertinent details.