If your stocking wasn't stuffed to your liking, it's time to trade in that ugly sweater from grandma for a flight out of town. Frontier is running a post-Christmas sale with $20 one-way flights.
The alluring one-way price isn't a bait-and-switch. You can grab round-trip tickets for as little as $38.40. Of course, the cheapest trips are over short distances, but there are good prices across the country. There are 30 routes with $20 tickets and 116 routes with one-way tickets for less than $50.
You can actually get the price down even further. For a limited time, you can use the promo code "SAVE75" to take an additional 75% off the fare. However, the cheapest tickets are mostly just taxes and "carrier-imposed fees," so the discount is minimal in some cases. But if your tickets cost more, you'll see a significant discount.