Ryanair Holdings Plc is locking the cabin door on traditional carry-on suitcases for its non-priority customers and forcing them to check the luggage for a fee—or go with a smaller bag—to save time loading passengers on and off flights.

Starting Nov. 1, Europe’s biggest discount airline will only allow travelers who pay for priority boarding to bring the so-called wheelies—the wheeled suitcases created to fit in overhead bins—on board along with a smaller item, it said Thursday. Non-priority customers can only bring the smaller bag, typically a handbag, backpack or laptop bag, onto the flight.

Traditional-size carry-ons, the larger of the two bags most airline passengers can now bring in the cabin, will be relegated to the hold and cost 8 pounds ($10.26) for non-priority customers to stow, Ryanair said. The Dublin-based airline said the move is aimed at speeding the boarding process and limiting flight delays. The company, known as the most efficient operator in the industry, relies on quick turnarounds to squeeze profit out of its tight schedule of cheap flights.

Ryanair billed the decision as a way to lower checked-bag fees by introducing a smaller and less-expensive category of checked baggage. It’ll cost 8 pounds for non-priority and 6 pounds for priority customers at the time of booking to check luggage weighing up to 10 kilograms (22 pounds). Currently the cost is 25 pounds to check any bag weighing up to 20 kilograms.

The company said it doesn’t expect to make more money from the change. Ryanair said it’s also increasing the size of the smaller category of carry-on bags by 40 percent.

Sixty percent of customers will be unaffected by the new policy, because they either pay for priority boarding already or travel with only a small bag, according to Kenny Jacobs, Ryanair’s chief marketing officer.

“We expect that the other 40 percent will either choose to buy priority boarding or a 10 kilogram check bag, or will choose to travel with only one (free) small bag,” he said in a statement.