Zone was started when LH imagined they would do something that resembled priority boarding. So window seats at the back of the plane were labelled Zone 1, then middle seats Zone 2, Aisle seats Zone 3 etc for that rear section of the plane. And an aisle seat in the front of the plane would be zone 5 or 6.

In the world of 2026 airport boarding, Zone 5 typically refers to the final general boarding group for passengers in the Economy cabin. Airlines use "Zone Boarding" to organize the flow of people and prevent bottlenecks at the gate. While Zone 1 is reserved for First Class and Elite members, Zone 5 usually consists of passengers in the last few rows of the aircraft or those with "Basic Economy" tickets. Because you are the last to board, a grounded reality of Zone 5 is that overhead bin space is often gone by the time you reach your seat. A supportive peer tip: if you are in Zone 5, expect to have your carry-on bag "gate-checked" to your final destination for free. To avoid the "Zone 5 struggle," many travelers try to book seats in the back of the plane (which sometimes board earlier in certain "Back-to-Front" systems) or use a co-branded airline credit card to get "Priority Boarding" and move up to Zone 2 or 3. If you find yourself in the final group, just be ready to move quickly and keep your essentials in a small bag that can fit under the seat in front of you.