Upgrade to Intl Biz Class on NW & Delta for One Mile Each Way

Normally, members of Northwest and Delta Air Line's frequent flyer programs can upgrade to business class on international flights by cashing in at least 20,000 miles each way when purchasing a full-fare coach ticket. 

But for a limited time, both airlines will move you to the front of the plane if you buy a full-fare coach ticket abroad and proffer one mile each way.  That's an international upgrade for just two frequent flyer miles, round trip.

Here's the small print: You can take advantage of this offer for travel between now and Sept. 15, but you must book your ticket by July 13, 2009.  Move fast.