Flexible United Airlines Flights from $39 Around the US!

United Airlines' latest sale has dozens of great fares, in fact, they have two sales going on at once. In one there are more than 100 routes available for under $100 and the other is for routes for under $70 to places where the weather is over 70 degrees. If you're loyal to United (for whatever reason), then these fares are a no-brainer, considering they're completely flexible. But if you're like most of us and don't have reason to be loyal, these fares will still be able to potentially save you $100s off of the rates you'd usually pay.