After Luke, Han and the others escape from the Death Star we seed Grand Moff Tarkin who talks to Darth Vader about the honing beakon. Vader says that they had gone into hyperspace and a few other things, but that's the important part. In the next scene Han and Leia are talking in the Millennium Falcon's cockpit. You can clearly see that they aren't in hyperspace, there aren't any streaking stars or the whitish-blue tube looking thing from the stars passing by quickly either.