According to WNYC, there are 634 runways in range of the missing flight. The Atlantic's Jim Fallows points out that not all of them, though, are big enough to handle a Boeing 777.

And the fact that we haven't heard about a landing means this is all probably a futile speculative exercise.

So. Where do you think this hunk of metal and its 239 souls ended up? And more important: How?

For WNYC's full methodology and interactive map, go here. And here is Fallows' fine-tuned map, made with open-source data crunched by reader David Strip.