VietJet Air has rapidly become one of Southeast Asia’s most popular low-cost carriers, connecting travellers from Vietnam to destinations across Asia and beyond. With its bright yellow planes and famously cheerful cabin crew, VietJet offers competitive fares that can sometimes undercut even other budget airlines. However, like all low-cost carriers, the headline price is only part of the story. To truly book like a pro, you need to understand VietJet’s fare structure, add-ons, and booking tricks. In this guide, we share our top tips, based on real passenger experience and published VietJet policies, to help you snag the cheapest seats and avoid surprises.