The Miqat is the designated place at which pilgrims must enter the state of Ihram at the latest. If you fly from Europe directly to Jeddah, you pass over the Miqat before landing – the crew usually announces it. Ideally, put on your Ihram garments before or during the flight and make the intention before passing the Miqat.
If you travel to Madinah first, you enter Ihram at the Miqat of Dhul-Hulaifah (Abyar Ali) on your way to Makkah.