This is the question that Slate is asking.
This thesis hinges on the idea that a large civilian aircraft flew across either Indian or Chinese airspace without either of the militaries noticing.
It would also depend on the aircraft flying close to the Indian-Chinese border, above Tibet, which is a tense and tightly guarded frontier.
Let's just say I am very skeptical.
16/3/14 UPDATE: No runways in Central Asia were even in range.
Nice job by @WNYC plotting all 634 runways there were apparently in range for #MH370. http://t.co/JRNS7L6JZQ pic.twitter.com/kF9Z0RZnkt— Jim Roberts (@nycjim) March 16, 2014