[Leslie]

I used a portable oxygen concentrator that my oxygen company provided as well as a concentrator in my home with a 50’ hose. I then purchased a POC from inogen as they now have one that goes up to 6 ltrs keep in mind that is pulsating and not continuous flow. For the airlines you need tn check with whatever airline you are flying because they all have different rules. A consistent rule is that you have enough batteries for more than the duration of your trip. Good luck and hope you are able to visit your family!