When it comes to traveling overseas or out of your country, travel insurance is an added layer of protection on both your flights (any changes, cancelations, outages etc), your luggage and your personal heath (covering things like emergency visits and dental)
For US residents check out AAA, if you carry a membership already with them you should get a discount.
If you are in Australia then you will want to check out Allianz here.
Plans are very affordable and start at like $50USD and go up from there.
I shot a quick video on this you can check out below...