Most commercial flights will have to taxi a short distance to the end of the runway, before actually taking off. But in an absurd, absolutely extreme case, what if that passenger plane could only taxi, not fly? How far would the plane be able to taxi before it runs out of fuel?
I imagine that the answer is in the ballpark of "many times around the world", given that passenger planes like a Boeing 777 or Airbus A380 hold tremendous amounts of fuel. However, since no plane has ever taxied until it has run out of fuel, I ask this question from a theoretical standpoint. I certainly wouldn't want to be on a plane taxiing the entire route from Los Angeles to New York!