From my guesthouse in Fukuoka to my guesthouse in Suwon, it took almost exactly 6 hours – of which only an hour and 15 minutes were in the air. I didn't have to pick coming back to the same guesthouse in Suwon, but I left a bunch of luggage here, and it's familiar.
I took the subway from the guesthouse in Fukuoka, near Nakasukawabata station, to the airport. I checked in, and waited around a lot. I flew. I landed in Seoul at 10:15, but by the time I got out front at the airport, it was just past 10:40, and the last direct airport bus for Suwon had left. Minor argh.
Rather than spend an exhorbitant amount on a taxi, I got a little bit clever: I took a bus #6020 which took me to Gyo-dae-yeok (University of Education Station), and from there I waited for the midnight (last run) of the #3000 bus that dropped me on my doorstep here in Suwon. It was much more reasonable in price, but a bit lengthy in ride-time.
Well, I'm here now. I'll post more tomorrow. It's very late, and I'm waiting for my friend to check me in…