Through 6/5, get up to 2 nights free at the 72-Hour Sale at Southwest Vacations. Choose a flight and hotel combo to destinations like Las Vegas, Orlando, and St. Petersberg, and you'll get a variety of discounts like 2 nights free when you book 5 nights, or a third night free on a long weekend. It's valid on travel from 8/25/14 through 12/17/14. Better yet, click here and sign up for their email newsletter to get a $50 off coupon! Taxes and blackout dates may apply.