Originally Posted by
CPH-Flyer
There are currently no flights from Haneda to Seoul. You need to fly via Narita for that.
JAL has yet to announce the Seoul schedule for June. With the supposedly easing of borders they may actually start flying to Seoul again. But currently neither JAL nor ANA flies to Seoul.
Thanks, I should have mentioned that. A potential positive is that June HND-GMP JAL flights haven't been canceled yet as far as I know, whereas the May ones were canceled more than a month out. SK's gov't does still list May as being when international travel to GMP is
supposed to start (phase 1):
Phased resumption of international flights - Seoul Metropolitan Government
Here's for hoping.