For my recent blizzard Korea trip (blizzard because I was crazy enough to decide and then buy the plane tickets 2 days before flying. It was my most frivolous trip yet haha) , I flew with Vietnamese Airlines and had more than 17 hours of layover in total, in Noi Bai Airport.
Being the Budget conscious traveller I am and having bought my tickets this late meant I had little flight choices. I went with the cheapest flight from Vietnam Airline. It cost me $496.03, tax and booking fee included.
Vietnamese airline offers a wide range of flight timings to Seoul and Busan. However, they pretty much all have layovers in Hanoi Airport. check out my short write up of my time at the Hanoi Airport transit/departure area.
Having layovers twice meant I took 4 different air planes. And I'm here with a short entry about my experience with Vietnam airline.