There are five direct and indirect flights connecting Chiang Mai and Tokyo every week, with the journey taking 15 hrs 50 mins on average.
All Nippon are the most popular airlines for flying from Chiang Mai to Tokyo. Adjust your search options to look by month, and see how much you could save if you fly during low season.
In Tokyo, New Tokyo International Airport (NRT) is usually the cheapest airport to fly to, but there are one airports to choose from. Not sure who to fly with? All Nippon are the most popular airlines available from Chiang Mai.
But if you can't find one which is right for you, try looking at flights to other cities in Japan to check out some other options.