So, I was totally unaware of Book With Matrix until I saw a post in this thead:
http://www.flyertalk.com/forum/28552127-post20.html.
Talk about cool.
I've spent some time playing around with options, including multi-stops involving 'weird' airline combinations. By 'weird' I mean non-Delta partner airlines and non-Sky Team member airlines. In each instance I was able to book through Delta.com.
I've seen this before on United.com, which has presented me with connection possibilities on Delta. But I don't think I could otherwise book a ticket on Delta.com involving a non-Delta partner airline or non-Sky Team member airline without the hack from Book With Matrix.
This raises a lot of questions, in my mind anyways.
I realize Delta has lots of interline agreements, including with many competing airlines.
Has anyone done this before? Have you experienced problems at all? I could imagine issues with baggage allowance or fees. And what about seat assignments?
Book with Matrix via Delta.com could really, really open up a lot of possibilities. Like flying through LHR, AMS and CDG to get to KUL, BKK or SIN.