I'm assuming you want VNO-EWR as your return.

You're allowed a stopover, so EDI will be your stopover. An agent can book that. If so, you can take longer if you wish.

If you're only doing a long connection in EDI because of availability, a good agent may be able to force it as a connection so that you don't use your stopover there. This is only an issue if you need your stopover elsewhere.

Also a lot of carriers don't show up online at co.com for awards. You may be able to find something better if you call or check other resources. Also if you can fly out of JFK, that opens up a lot more options.