What this record means
The record shows the mark NORTHWEST AIRLINES WORLDVACATIONS was registered to Northwest Airlines, Inc. and is now cancelled, with the last status change on September 2 2011 when the required Section 8 declaration was not filed. It covered a Service Mark in International Class 039 for “Travel Agency Services, namely, making reservations and bookings for transportation; arranging of travel tours,” so a later use of a similar name in the travel‑booking or tour‑arranging space would be the closest area of concern. The record does not give the owner control over every possible use of the words “Northwest,” “Airlines,” or “Worldvacations” outside those listed services. Because the registration was on the Principal Register, there is no Supplemental Register sequence to note. The prosecution history shows no oppositions, cancellations beyond the Section 8 lapse, or other enforcement actions, so the supplied history shows none. I'd treat this as a meaningful concern if you plan a travel‑agency brand that resembles the cancelled mark.
Informational only - not legal advice.