Yes, Artful, "I'll Fly Away" is the same kind of theme, but it doesn't express the idea that "I'll still be with you" the way Eric's song does.

Which reminds me, another song that does touch on this is "Bright Morning Stars Together."

And a song that I've sung for friends' memorials which isn't specifically about departing this world, but which I think really fits, is the WWII song "I'll Be Seeing You."

"I'll Be Seeing You in all the old familiar places
That this heart of mine embraces all day through.
In that small cafe, the park across the way,
The children's carousel,
the chestnut tree, the wishing well.
"I'll Be Seeing You in ev'ry lovely summer's day,
In ev'rything that's light and gay --
I'll always think of you that way.
I'll find you in the morning sun, and when the night is new
I'll be looking at the moon, but I'll be seeing you.