What is a United Airlines infinity ticket? And does this reader have one -- or is she out of luck? Let's find out.

What is a United Airlines forever ticket?

Does Laura Luu have a United Airlines forever ticket? And if so, can she get a new ticket from San Francisco to Beijing?

Luu thinks the answer is “yes” — and “yes.” And she thinks she has the proof. But as with all airline matters on this site, it’s a lot more complicated.