He came to Jeddah not intending to do ‘umrah, then he decided to do ‘umrah and entered ihraam from Jeddah
Question

                I came from Jordan to Jeddah by plane, heading for the city of Beeshah, and I did not intend to do ‘umrah or even go to Makkah, but the plane to Beeshah was delayed and I stayed in Jeddah for two days, during which I entered ihraam from Jeddah and went to Makkah to do ‘umrah. Is this ‘umrah valid?.
Praise be to Allah.
    This ihraam is valid, because you formed the intention for it 
    from Jeddah, and you did not intend to do ‘umrah before that, so you do not 
    have to offer any sacrifice for that. The basic principle concerning that is 
    the hadeeth of Ibn ‘Abbaas (may Allaah be pleased with him): The Messenger 
    of Allaah  defined the meeqaat of the people of Madeenah as 
    Dhu’l-Hulayfah; that of the people of Shaam (Syria) as al-Jahfah; that of 
    the people of Najd as Qarn al-Manaazil; and that of the people of Yemen as 
    Yalamlam. And he said: “And these meeqaats are for the people at those very 
    places, and besides them for those who come thorough those places with the 
    intention of performing Hajj and 'Umrah; and whoever is living within these 
    boundaries can enter ihraam from the place he starts and the same applies to 
    the people of Makkah who may enter ihraam from there.” (Agreed upon). What 
    is indicated by the general meaning of this hadeeth is that the one who 
    wants to enter ihraam for ‘umrah may do so from Makkah is not as it appears 
    to mean. There is evidence that the one who wants to enter ihraam for ‘umrah 
    when he is in Makkah should enter ihraam from outside the sanctuary. It was 
    narrated that ‘Aa’ishah (may Allaah be pleased with her) said: The Messenger 
    of Allaah  (peace and blessings of Allaah be upon him) camped in 
    al-Muhassab, then he called ‘Abd al-Rahmaan ibn Abi Bakr and said: “Take 
    your sister out of the sanctuary and let her enter ihraam for ‘umrah and 
    circumambulate the House, and I will wait for you here.” She said: So we 
    went out, and I entered ihraam then I circumambulated the Ka’bah and did 
    saa’i between al-Safa and al-Marwah, then we came to the Messenger of Allaah 
     (peace and blessings of Allaah be upon him) in his camp in the middle 
    of the night. He said: “Have you finished?’ I said: Yes. So he told his 
    companions to move on, and went out and came to the Ka’bah and 
    circumambulated it before Fajr prayer, then he set out for Madeenah. Agreed 
    upon. 

    And Allaah is the Source of strength. May Allaah send 
    blessings and peace upon our Prophet Muhammad and his family and companions. 
    End quote. 

    Standing Committee for Academic Research and Issuing Fatwas 

    Shaykh ‘Abd al-‘Azeez ibn ‘Abd-Allaah ibn Baaz, Shaykh 
    ‘Abd-Allaah ibn Ghadyaan, Shaykh ‘Abd-Allaah ibn Qa’ood.