Originally Posted by
mlin32
Well, I was looking at fares on behalf of my parents and DL isn't actually cheaper for cash fares in all instances,
at least not from the east coast of the USA. It does have a better schedule though.
But there is surprisingly prime ticket availability on Flying Blue for the route

, I guess DL is trying to fill its planes with redemptions.
Delta isn't very good at getting customers from the east coast to Seattle yet, but if you look at markets where they have nonstop service to Seattle (e.g. PDX, SLC, DEN), the fares are comparable to UA via SFO.
Meanwhile, the Taiwanese carriers aren't super competitive beyond their gateways (I.e. even though JX has the AS partnership, AS doesn't toss in SEA-PDX for next to nothing, and JX doesn't eat this cost). But, they don't really care about PDX-TPE because they can pull off routes like SEA-KUL, which neither Delta nor United can.