China Eastern Airlines have just greatly discounted flights from Europe to various cities in Japan and South Korea. If you are flexible and can depart till end of year 2017 you can book return flights from Rome, Madrid, Prague or Frankfurt already for €308! Fare of this SkyTeam member is including all taxes and fees as well as checked bag. Note that some of the flights may require longer layover in Shanghai. Take the opportunity and visit China on your way. (You can get free 144h transit visa on arrival as long as there is no domestic flight in your itinerary. If you purchase this deal through official website of China Eastern Ailrines you can benefit from free hotel during layover in Shanghai. More details here.
As mentioned this China Eastern Ailrines special sale is valid for flights departing between March and beginning of June 2018. (Seems that from Prague you can only fly in March). Max stay 1 month. Promotion is available till 17th of February or until sold out. If you need accommodatioin in South Korea or Japan we recommend Booking.com. Hotels.com or Amoma. Below you can refer to our booking sample from each of the European cities.
Booking samples
South Korea - Look for flights to Seoul or Jeju Island
Madrid - South Korea from €308
Prague - South Korea from €314
Rome - South Korea from €318
Frankfurt - South Korea from €356
Japan - Look for flights to Tokyo, Osaka, Fukuoka, Komatsu, Nagoya, Okinawa, Niigata, Shizuoka, Toyama, Sapporo etc..
Rome - Japan from €317
Madrid - Japan from €332
Frankfurt - Japan from €355
Prague - Japan from €402
Booking sample of Cheap return flights from Europe to South Korea or Japan from €308 here. As per our above booking sample you would depart from Madrid to Seoul on 21st of April. Your return flight from South Korea to Spain would be then on Saturday, 5th of May 2018.