Miqat: What Every Pilgrim Should Know
A miqat is a boundary that anyone intending Hajj or Umrah must not cross without Ihram. Hadith name five: Dhul Hulayfah (Abyar Ali) for those coming from Madinah, al-Juhfah for those coming from the Levant and Egypt direction, Qarn al-Manazil for Najd, Yalamlam for Yemen, and Dhat Irq for Iraq.
Travelling by air
Air pilgrims enter Ihram when level with the relevant miqat, which is announced on many flights. Many people put on Ihram clothing before boarding and make the intention when notified. Ask your group or airline how this will work before you fly.
Residents and visitors from within
People living inside the miqat zone enter Ihram from their homes for Hajj. People in Makkah entering Ihram for Umrah usually go outside the Haram boundary, such as to at-Tan'im. Those who go to Jeddah first and had not intended the pilgrimage before reaching it should ask a scholar about where to enter Ihram.
Passing it without Ihram
If you cross it intending Hajj or Umrah without Ihram, most scholars say to return and enter from the miqat if you can; otherwise a sacrifice (dam) is required. Ask a scholar for your case.