Praise be to Allah, and peace and blessings be upon the Messenger of Allah. To proceed:
Asking about the blessings of Paradise is not an inappropriate question. Rather, such questions can increase a Muslim’s longing for Paradise and encourage him to work for it.
It has been authentically established that in Paradise there is whatever the soul desires and whatever delights the eyes. The Prophet ﷺ said to the one who asked him about horses in Paradise:
“If Allah admits you into Paradise, you will have a horse of red ruby, and you will fly with it in Paradise wherever you wish.”
He ﷺ also said:
“If Allah admits you into Paradise, you will have in it whatever your soul desires and whatever delights your eyes.”
Allah تعالى says:
﴿And in it is whatever the souls desire and whatever delights the eyes, and you will remain there forever.﴾ [Az-Zukhruf 43:71]
And He سبحانه says:
﴿For them therein is whatever they wish.﴾ [An-Nahl 16:31]
The Prophet ﷺ also said in what he narrates from his Lord:
“I have prepared for My righteous servants what no eye has seen, no ear has heard, and what has never occurred to the heart of a human being.” Agreed upon.
It has also been authentically established that the souls of the martyrs are in birds that roam freely in Paradise wherever they wish. It is also established that Ja‘far ibn Abi Talib, may Allah be pleased with him, flies in Paradise with two wings with which Allah honored him.
Therefore, the basic principle is that the blessings of Paradise are complete, and that the believer will have therein whatever delights and pleases him. However, it is not permissible to definitively state that there are airplanes or airports in the form known in this worldly life, because this belongs to matters of the unseen that require specific evidence.
What we must believe is that Paradise contains blessings that the souls desire, and that its reality is far greater and more perfect than anything we can imagine in this world.
We ask Allah to make us among the people of Paradise and its blessings.
And Allah knows best.