After more than 50 years, Southwest Airlines is getting rid of its unique open seating model and will now assign seats.

The airline made the move to meet the evolving preferences of customers who say they want seat assignments. Southwest also said it conducted testing that included live and more than 8 million simulation-based boarding trials before making the change.

Research from the airline shows 80% of Southwest customers and 86% of potential customers prefer an assigned seat. And when customers opt to stop flying with Southwest in favor of a competitor, the No. 1 reason they cite leaving is open seating.

The major shift comes as the airline faces mounting pressure to increase revenue.... Read More: WMAR2NEWS