MIAMI — United Airlines is set to launch a new ‘Basic Economy’ fare class, following suit with Delta and American to fight ultra-low-cost carriers encroachment.

According to United, the new fare class will only be available in select markets, and will provide customers the same standard economy experience, including food, beverage, Wi-Fi and personal device entertainment options with some key differences. Basic Economy passengers will be assigned seats on the day of departure, be assigned to boarding group five and be permitted only one personal carry-on item that must fit under the seat. Also, Customers will not be eligible for Economy Plus or premium cabin upgrades.

“Customers have told us that they want more choice and Basic Economy delivers just that,” said Julia Haywood, executive vice president and chief commercial officer. “By offering low fares while also offering the experience of traveling on our outstanding network, with a variety of onboard amenities and great customer service, we are giving our customers an additional travel option from what United offers today.”

In addition to Basic Economy, United will continue to offer economy, Economy Plus and domestic first class, and it remains on track to introduce Polaris, its international premium travel experience, on December 1. The company is evaluating a new premium economy experience for domestic and international markets.

Delta Air Lines has already launched a similar fare type, while American Airlines is expected to introduce the fare class next year.