How do I upgrade my seat? Seating requests and upgrades are not handled by DeNA TRAVEL and the flight operator should be contacted directly. Was this article helpful? Can't find what you're looking for? Inquiry Form Related articles Do I have to confirm my flight booking? How to check my booking on Vietjet Air website How do I get a boarding pass? What do I need to check in for my flight? What do I need when I contact the airline?