Since I don't see the thread, there you have…
Kabu no Isaki by Ashinano Hitoshi
Kabu no Isaki
by Ashinano Hitoshi the same author of Yokohama Kaidashi Kikou.
Adventure - Sci-fi - Seinen - Slice of Life
From wiki:
Isaki is a young airplane pilot who flies a Piper Super Cub. The Cub is owned by the beautiful Shiro, and Isaki often flies errands for her as a way to pay for his use of the plane. Shiro's younger sister Kajika is also capable of flying the plane and occasionally accompanies Isaki on his journeys.
Kabu no Isaki shares many characteristic hallmarks of Ashinano's style: fascination with aeronautical themes; a setting in the future; a setting on and around the Miura peninsula; a vision of Japan that is isolated and nostalgic; and a natural world full of mystery that the protagonists explore with a sense of wonder. As such there are many parallels with Ashinano's previous work Yokohama Kaidashi Kikō.
Personal comment: Just wonderful!!
The manga is already complete in Japan (6 volumes), and Roselia Scanlations group is translating it into English. They go in vol 5, and the last chapter has been released 3 weeks ago.