Originally Posted by
flyerCO
Bottom line, generally DL agents will check through to any carrier thry have interline with. Acting like all that matters is a policy that is generally ignored (if even know about by most agents) is doing a disservice to people asking gor advice.
DL has interline agreements with a hundred and something airlines, give or take. I don't expect that DL will be checking your bag through on a separate ticket if you're connecting to UA or AS, both interline agreement carriers.