WIFI router while in airplane mode

I am trying to connect to wifi and the use my phone as a router on a upcoming trip while in airplane mode. I know you used to be able to do this but I can not find the option in 5.02. The only option is tethering with my 4g which will not be an option as we will be out of the country. I tried several apps but they all use 4G. Anyone have an idea on how to do this? Thank you