Nothing (cheap, at least) will take you directly to Lawrence. Once you get to KC, you'll probably have to take a taxi, or transfer to
TheJo. It's a hike to the Route A bus stop (you might be able to get a
KCata bus in between Megabus and TheJo), but you can take that all the way to JCCC and transfer to the K-10 connector that will take you all the way to the KU campus.