I had NW take 3 weeks to issue a ticket recently.

It actually caused quite a problem because it was bought on a debit card and the authorization dropped off. Well, I didn't even think about it and meanwhile closed the checking account it was linked to. A few weeks later I get a notice from the bank saying that they paid it (I assume since it was at one time authorized) and wanted reimbursed. Personally I wish they would have denied the payment since NW dragged their feet so long in charging it... the ticket was for my soon to be ex-wife. Would have been pretty funny if she showed up at the airport with no ticket since she's the one that actually closed the account without discussing it with me first.