I need to get from DFW to ORD and then 2 days later to YQB next August. I then need to return YQB to DFW.

I don't want the routing AA has via BOS.

Can someone please help me with this? Also which airline should I use for online booking?

I only have memberships with AA, BA and Delta, but will open a new one if I have to.

I wouldn't mind a bargain price, for sure.