At roughly 8:56 the plane appears to stop in south Ohio:

At 9:07 it suddenly reappears further along its flight path then then stops again, apparently moving west

At 9:25 the plane reappears again this time on the border between Indiana and Illinois

At 9:43 (after the official crash into the Pentagon) Flight 77 is flying over south Illinois and is nowhere near the Pentagon. The last few blips after that seem to be fairly random, but ultimately the plane seems to get as far as Kansas.