While most people in the travel hacking community blog about business and first class redemptions, we try to keep it real and fly ultra low cost carriers on short domestic or international trips. This stems from my original roots of flying budget carriers in Asia and Europe as a means to explore, and it’s a cheap and fun way to discover the world one city at a time. For this post, we look back at our experience using Allegiant Air from Jacksonville to Memphis and back. Like our Dallas trip, our Memphis trip was another impulse buy. Allegiant had a super cheap sale; we didn’t know anything much about…