Can I check in at a Delta ticket counter for my upcoming flight on Northwest and vice versa?
In some airports, Delta and Northwest’s operations have been consolidated and only Delta ticket counters exist. If this is the case and you are flying on a Northwest ticket, you may check in at a Delta ticket counter. Terminal information is found on your itinerary at delta.com or via flight and gate status on nwa.com. You may also visit the airport website for additional information.