Get approved for the Southwest Airlines Visa card and earn 16 rapid rewards credits after your first purchase, enough for a free roundtrip ticket. They are also offering additional credits for balance transfers (balance transfer fee applies).
Previously the promotion has been 8 rapid rewards credits for signing up and using the card. So.....with the annual fee of $59.00 per year - $59 bucks to fly to one of the many destinations Southwest serves in the U.S makes this a hot offer. More information here.
Thanks to RedSox9547 on fatwallet for pointing out this offer.