  We propose a scheme to obtain a low-loss propagation of Airy surface plasmon
polaritons (SPPs) along the interface between a dielectric and a negative-index
metamaterial (NIMM). We show that, by using the transverse-magnetic mode and
the related destructive interference effect between electric and magnetic
absorption responses, the propagation loss of the Airy SPPs can be largely
suppressed when the optical frequency is close to the lossless point of the
NIMM. As a result, the Airy SPPs obtained in our scheme can propagate more than
6-time long distance than that in conventional dielectric-metal interfaces.
