Travel Hacking Airlines in Asia Without Credit Cards or Frequent Flyer Miles

My visa was about due to expire and I needed to leave Vietnam to re-apply, lest I be hunted down by the government and imprisoned as an illegal immigrant! Or at least that’s what I’d like to imagine could happen  Of course things aren’t that serious, and traveling around Asia can be surprisingly cheap, so no biggie. I’m going to share with you my own...