Originally Posted by Dave Noble

Interlining only occurs where bags are checked from 1 aiurline to another. There cannot be interlining within an airline ( that would be an online transfer)

Unless an airline has a policy stating that it will check bags through, then the expectation to work with is that it will not check bags through and also unless it has a policy to protect missed onward flights on separate tickets, to expect and plan that if a flight delay occurs and the onward flight ismissed, that passenger will be the one responsible to sort out rebooking and payments for new fares/changes