經濟艙
At the other extreme, some extra legroom seats in Economy Class, with the same service and seat model, are also marketed as an enhanced Economy class in some airlines. For example, in the United States domestic market, airlines such as American, United, Delta, and JetBlue have an upgraded Economy class with more leg room as the only difference; they market the class as "Main Cabin Extra", "Economy Plus", "Comfort+," and "Even More Legroom" respectively, while other services such as ground services and food and beverage services are on par with their normal Economy Class.