Northwest has matched United’s reintroduction of ‘fly three, fly free’ and upped the ante.
Northwest is offering international as well as domestic free travel, and most fares are eligible (although the lowest — L, T and K class domestically and V, L, T, and K internationally — are not eligible).
Unlike United, Northwest will award credit towards this promotion when flying discount coach fares that include a Saturday night stay.
Registration is required.