Hi,

Delta cannot through checked bags via other airlines?

That meaning is if i have a separate ticket by US airways 1st segment, US Airways cannot do it(only ticket issued routing). How about Delta if i have a first segment trip? I saw other forms each Delta separate ticket is possible through checked bags(for example : ORD-MSP, MSP-LAX 2 tickets by Delta). But, other airlines is not work. Is it correct?

Usually, my experience AF is not work even if Skyteam partner flights separate ticket issued.

KE, OZ, LH etc international flight company is possible.