Getting far away for less than $50 is actually possibly, as long as you jump on this Southwest sale as quickly as possible.
Right now, Southwest Airlines is offering flights starting at just $44 one way for fall travel between late August - November, and there are a ton of sale destinations. Included in the low fares are Los Angeles to Phoenix for $49; Atlanta to Cancun, Mexico for $165; and Los Angeles to Liberia, Costa Rica for $174, among many, many others.
And unlike most flash sales, this one gives you a little longer to book, as it's valid until May 19, 2016. However, some of the best deals can, and most likely will, sell out before then, proving that yes, as always, the early bird gets the bag of peanuts. Of course, black out dates and travel restrictions apply, but you can read about all that here before booking.