This isn't really MR related, but I'll tell you what I know. A lot of airlines (Delta and US I know of) cut out these fares because people were abusing them. I'm almost sure that NW still has them. I never fly them, but I did have to check recently for a friend who needed to attend a funeral in Florida. I know she had 2 choices, and 1 was definitely UA. Most of the airlines said they don't offer them anymore, and UA was the lowest. I remember calling every airline and getting 2 fares -- one on UA and 80% sure the other was on NW. I know UA's was the lowest, and that's what she went with.

I know it's not much help, but maybe it will help you some. You do have to call the 800 number to book it. You also have to provide them with the funeral home name and number and the name of the deceased plus relation to you. They really want to document this stuff to try and keep people from abusing them. I can't imagine for the life of me why anyone would use death as an excuse to get a cheap fare, but I guess some people have no shame.

I hope this helped you some and I'm very sorry for your loss.