Is there any web that you can make your own reservation with multiple points "with multiple airlines options"? I know I can get an itineray for multiple stops with Expedia but that allows me to choose only one airline. Say I want to fly from CMH to MCO roundtrip via IAH on the way down and via DTW on the way back. My scenarios is to use both CO and NW such as:

CMH-IAH-MCO on CO
MCO-DTW-CMH on NW

Again, Expedia, Travelocity or ITN does not have the capability. I didn't find any web yet to enable me to find the route and fare info (except going through travel agency's CRS system).

If anyone knows the web that gives me the flexibility of the above, please let me know.

Thanks.

Sam