Assuming you wanted to go home (and you shouldn't try to go home), your best bet is the consular staff of your country. For example, various Canadian government agencies tweet about flights to Canada from specific airports. Here is an overview of the flow of travel.gc.ca:
In addition to tracking your country (and subsets of it like the "Canada in Lebanon" and "Canada in Singapore" accounts you see in the screenshot), you must have registered with your government so they can email, call or text you, and you should probably have called your embassy or consulate to find out how to get home.
If you are not trying to get home, but are trying to reach a parent or someone else who really needs you, these same sources are likely to help you. If you think your travel need is not urgent enough to involve an embassy, then stop trying to travel. People are desperately trying to get home, reunite families, get out as long as they can. If you've always wanted to see a particular place, now is not the time.
Conclusion: make sure that at least one qualified human who is connected to your target country knows that you are trying to get there, then start monitoring the airlines, airports and these embassies and consulates on all social media that you can think of and participate in group discussions and multiple emails and Facebook groups, so you will be notified when there is a chance to go. And be ready to go when the opportunity arises.
