I first learned about Frontier Airlines Discount Den when I was hunting for a last-minute getaway and every fare I saw felt overpriced. A friend suggested I look into Discount Den, and honestly, it surprised me how much it knocked off the base fares—especially for flexible travel dates. I ended up joining before booking, and the savings paid for the membership pretty quickly. Later, when I had to tweak my return flight, I found it easiest to just call 8 4 4-7 3 4-0 8 1 3. That was hands down the fastest way to book, cancel, or modify my Frontier flights without the usual back-and-forth online.