Praise be to Allah.
If a person is able to do Hajj and meets its conditions, then it is obligatory for him to do Hajj that year, and it is not permissible for him to delay Hajj for the sake of his parents or anyone else, because Hajj is obligatory immediately according to the more correct of the two scholarly opinions, and an individual obligation takes precedence over honouring one’s parents. Allaah says (interpretation of the meaning):
“And Hajj (pilgrimage to Makkah) to the House (Ka‘bah) is a duty that mankind owes to Allaah, those who can afford the expenses (for one’s conveyance, provision and residence); and whoever disbelieves [i.e. denies Hajj (pilgrimage to Makkah), then he is a disbeliever of Allaah], then Allaah stands not in need of any of the ‘Aalameen (mankind, jinn and all that exists)”
[Aal ‘Imraan 3:97]
And the Prophet (peace and blessings of Allaah be upon him) said: “Hasten to go out to Makkah, for one of you does not know what he will face of sickness or need.” Narrated by Abu Na’eem in al-Hilyah and by al-Bayhaqi in Shu’ab al-Eemaan; classed as hasan by al-Albaani in Saheeh al-Jaami’ (3990).
See also the answer to question no. 41702.
But the parents’ Hajj in this case is valid, and this son should hasten to do Hajj when he is able for it.
The scholars of the Standing Committee for Issuing Fatwas were asked: Is it permissible for a man to send his parents for Hajj before he goes for Hajj himself?
They replied: Hajj is obligatory for every free, adult Muslim of sound mind who is able to perform it, once in a lifetime. Honouring one’s parents and helping them to do this duty is something that is prescribed as much as one is able to. But you should do Hajj for yourself first, then help your parents if it is not possible for you all to do Hajj together. But if you send your parents for Hajj first, their Hajj is still valid. And Allaah is the Source of strength. End quote.
Fataawa al-Lajnah al-Daa’imah (11/70).
And Allaah knows best.