Does anyone have an idea how to force CO's website to include NW routes that I can find on Expedia or Orbitz , but not on CO's website. I am trying to force a IAD-MSP-ATL routing. when I put in IAD-MSP I don't get the direct NW flights but a connection through CLE on ERJ's which I don't want.

When I do this on Orbitz or Expedia, it shows the flights i want at a good price. I just prefer to get the CO bonus online.

Anyhelp or info would be appreciated