Hopefully this will benefit someone:

Enjoy great E-Cert fares as low as $188* roundtrip! This exclusive e-mail offer is available only to select WorldPerks members.
Saving is easy. Book your trip today!

Check the Zone Map and Fare Chart below to find the fare to your destination.
Using Reference Code PK114 and your WorldPerks number as the E-Cert number, make your reservations by:
Clicking on the red button below
Calling Northwest Reservations at 1-800-225-2525
Or contacting your travel professional
Purchase your ticket no later than May 3, 2006 and complete your travel by June 9, 2006.

Le Fine Print:

See the terms and conditions below for complete details. Terms and Conditions
This E-Cert offer entitles up to two (2) passengers traveling together on the same flights and dates to purchase reduced-rate roundtrip Coach Class tickets valid for travel to select markets in the 48 contiguous United States and Canada, excluding travel to/from Nevada and Florida.