Save up to $100 on Lake Tahoe and Reno ski vacations! Use promo code: LKTAHOE100. Book 10/14 - 1/19/12. Use current promotional code coupon to save special fares online with Southwest Airlines. Fares must be booked by 19 January 2012. Travel with current discount coupon must take place between 14 October 2011 and 31 March 2011.