Originally Posted by
findark
In the event of IRROPS, you deal with the operating carrier of the affected segment, by default. So Delta would have you covered here.
+1. I wouldn't be too concerned on this one. It sounds like you are on DL metal all the way until AMS so they should be able to easily re-accommodate you for IRROPs and then they'll just work with KLM to get you on the next AMS - BUD flight.
When is your flight? Next summer, DL is running very late night DTW - AMS flight (1130pm departure), so there would have to be some serious IRROPs (even coming from the east coast) to misconnect on that one. Do keep in mind that for a late night TATL, DL is very likely to hold the plane for late arrivals to avoid having to re-book them.
Especially if you are coming on LAX - DTW which is likely to have multiple people connecting onwards to AMS.
One other thing to note (as mentioned above), in the case of serious IRROPs from LAX, you could be moved to any of the DL/KLM direct flights LAX - AMS including the relatively late 7pm LAX - AMS flight on DL metal.
And I agree with others, 70 min at DTW is plenty of time unless there are serious IRROPS. There are often TPAC connections offered at DTW with 35 minute connections (e.g., RDU - DTW - ICN)