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You are confusing airgapped wallets with broadcasting transactions. It is of course entirely possible to run an airgapped wallet and transfer signed transactions to an online computer in order to be broadcast. What OP is asking is what to do if you do not have an online computer in order to broadcast your transaction.
I am not confusing airgapped wallets with broadcasting transactions as far as I know, you see the hr on the reply before I stated methods of sending transaction offline, there is no way I stated a broadcasting transaction on that part did I? I just summarized what had been discussed on the earlier replies. Anyway, still thank you to the clarification.
In this case you need to use something like radio (as I've discussed earlier in this thread) to send your transaction to someone who does have an internet connection and can broadcast your transaction for you.
Indeed since this idea and procedure had been brought up in the earlier replies I think there is no need for me to reiterate what you had been explained since it is very clear and easy to understand.