Originally Posted by
xliioper
Again, they coordinate fare filings with DL, and other than BE/Light fares, you get a full credit with no fees if you cancel on non-refundable ex-US fares. The main difference will be that a DL credit will be applicable to US domestic tickets while a VS credit won't be usable on such fares.
That was exactly my line of thinking. If OP will be able to use a VS e-credit down the road this is a non-issue. But if travel to Europe is sparce, this could be a factor. I had a similar case, albeit domestically, that played out this week. Had a choice of booking an AS flight directly with AS or through AA as an AA Codeshare. The AA Codeshare was a few bucks more but there was a good chance the trip could cancel (and it did - it was booked for this week and the trip was canceled due to the government shutdown), so I'm glad I booked with AA because an AA ecredit is far easier for me to use than an AS ecredit would be.