Every time I fly from England to the US
⇒　イギリスからアメリカに行く度（たび）に
I read them on the plane
　　⇒　飛行機の中でその本を読みます。

I think it is rather difficult to translate this sentence, because we don't have one word for "fly," and if we say ｢飛行機に乗る」for "fly" we meet another difficulty in translating "on the plane." (Does it make sense?)

walk to school ⇒　学校に歩いて「行く」
　　　　　　　　　　　　　rather than 学校に歩く
fly to England ⇒　イギリスに飛行機で「行く」
　　　　　　　　　　　　rather than イギリスに飛ぶ

I haven't read either English Harry Potter or Japanese Harry Potter. Can you guess why? I don't want to read Japanese ones because I'm too proud to do that, but actually English Harry Potter books are kind of difficult for me to read without a dictionary!

I'll give this a try.

きょうは息子とふたりで「ハリー・ポッター」という映画を観にいきました。
映画はとても楽（たの）しかったです。
イギリスからアメリカに帰る飛行機のなかで、わたしはいつも大好きなハリー・ポッターの本を読んでいます。

I cannot recall, but I think I read the UK version till the 3rd one. I enjoyed it very much. There are lots of vocabulary which I didn't catch the meaning, somehow overall it's very touching. I think it's her love to her kids that makes the books so wonderful. And the really classic feeling - you know Harry's going to be fine, like reading a picture book - makes me feel good. But, the ending is always out of my imagination, that again makes it more wonderful.