Southwest Airlines is celebrating its 46th birthday with a sale featuring round trip tickets inside the United States for as little $77.96. There are hundreds of routes available, and there are even select flights out of the country in the sale as well. You can head to Cuba ($99 one-way), Mexico ($99), Costa Rica ($119), the Caribbean ($121), Puerto Rico ($137), and Belize ($140).
Inside the U.S. the prices are good with many fares available for under $100 round trip, including taxes. Best of all, Southwest isn't a budget airline that will ding you for every breath you take along the way. According to the site, tickets include two free checked bags.