ave $50 on a Dallas Vacation! Book a flight + hotel vacation package for 3 or more nights at any hotel we offer in Dallas and save $50 when you travel 1/1/12 - 4/9/12. Use current promotional code coupon to save special fares online with Southwest Airlines. The cheap airline tickets are only available through 24 November 2011. Travel with discount tickets valid between 01 January 2012 and 09 April 2012.