We've scanned every flight from Hanoi to Tokyo to find the best deals. If you want a cheap flight, it's best to be as flexible as you can on dates. At the moment, the cheapest flight is on 25 / Oct / 2023. If that day's no good for you, try searching by month to see some alternative dates.
New Tokyo International Airport is just one of the airports in Tokyo. If you're not set on a specific airport, try changing your search from New Tokyo International Airport to Tokyo to see a broader range of flights – they might be cheaper. It usually takes about 7 hrs 10 mins to fly 3723 km to New Tokyo International Airport.
There are about 149 flights to or via Tokyo every week, so you have plenty of options.
During this peak season, accommodation prices often increase too, so it's best to book early. Or you could keep your fingers crossed and hold out for a last-minute deal.