How Long 'til Black Future Month? by N. K. Jemisin [goodreads link] is a collection of speculative sci-fi/fantasy short stories -a few of these were fleshed out into YA novels/series. There is a little bit of everything in there, and while not always breezy, you don't have to commit a lot of time to get to the interesting bits.
Literature
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They’re not YA, but I recently read The Poppy War trilogy by RF Kuang and The Jade Bone Saga by Fonda Lee (first book is called Jade City) and would definitely recommend them.
In YA, if you enjoyed Children of Blood and Bone you’ll probably also enjoy Raybearer by Jordan Ifueko. I’d also recommend Six of Crows by Leigh Bardugo.
these look awesome, thank you!
If you haven't read Ready Player One then it's a good sci-fi / young adult book.
There is also Ready Player Two after you finish that one.
Cory Doctorow also released a new sci-fi book recently, called Red Team Blues, which you may be interested in.
It is a quick read, but Fahrenheit 451 is one of my favorite books. It really mirrors modern day society. The book really predicted what the world would become. Sadly the authors was right. I am not sure if it is the kind of book you are looking for.
I really enjoyed The Daevabad Trilogy by S.A. Chakraborty and I think that they fit your 'don't be bored on the plane' criteria.
This isn't sci-fi or fantasy, but Out by Natsuo Kirino is a gripping, page-turning Japanese thriller that should keep you occupied and ready for Tokyo.
grabbed it, thanks!